Eyecare

Prism glasses are glasses with (you guessed it) prism lenses. As the name implies, many prism lenses have a wedged or triangular shape to help people with conditions like Binocular Vision Dysfunction (BVD) and double vision to see better.

Keep in mind you'll need a doctor's prescription to use prism glasses.

How do prism glasses work?

Many of those suffering from eye misalignment cannot see just one image because their two eyes are looking in slightly different directions. This causes conditions such as BVD, double vision, headaches, motion sickness, and more. Prism glasses are designed to help with this.

There are two main types of prisms used on these glasses: press-on Fresnel films (which we'll talk about in the next section) and ground-in prisms. Ground-in prisms are made by optical shops and have a triangular or wedged shape.

The unique angles of prism lenses help redirect light to the right place on the retina and help align the images into a single sharp image, therefore helping the patients to perceive one clear image instead of two images or a blurry one. They can also help to relieve other symptoms like headaches and motion sickness.

However, prism glasses are more like a temporary relief than a complete treatment. Once the patients remove the glasses, the symptoms will return. For a more permanent solution, there are vision therapies and eye surgeries that can help treat these conditions.

What do prism glasses look like?

You might not be able to tell the difference between prism glasses and ordinary glasses.
Source: Designecologist

Most prism glasses usually look just like any other glasses because the thing that makes them different is the lenses, rather than the eyeglass frames. Apart from having thicker lenses on one side, the rest of the glasses look just like regular eyeglass frames.

That said – prism glasses that use the Fresnel prism method tend to be noticeable since they utilize a piece of see-through sticker on one lens or both.

Prism glasses could also look like this.
Source: American Academy of Ophthalmology

Because they're easy to remove, Fresnel prism stickers are great for testing out the prism and good for those whose prescriptions might change soon, and for changing prism strength. Fresnel prisms also can be used to cater to some types of prescriptions which optical lenses aren't able to handle.

How is prism indicated on a prescription?

If your eye doctor decides that you require prism glasses, it'll be indicated on your eyeglass prescription with two values: Prism and Base.

These values indicate what shape the lens needs to be in to correct your vision properly. Typically, the base values will either be 'in' or 'out' / 'up' or 'down'

Benefits of prism glasses

Not everyone needs prism glasses, but for those suffering from conditions caused by eye misalignment, there are many benefits, such as:

• Treating symptoms of BVD (Binocular Vision Dysfunction).
• Alleviating symptoms of tunnel vision (severe loss of peripheral vision).
• Relieving eye strain due to eye muscles constantly working to realign themselves.
• Relieving neck strain caused by constantly tilting the head to one side to see better.
• Improving 3D (3-dimensional) vision and depth perception.
• Improving security while walking by having a better vision.

Do prism glasses cause any side effects?

A headache is one of the most common side effects of wearing prism glasses.
Source: Alex Green

Like normal glasses, prism glasses also take some getting used to when you first get them. For the first few days, it's normal to experience some eye strain. However, if the glasses are not well fit or if the prism values are wrong, you might experience some negative side effects, including:

• Headaches
• Nausea
• Double vision
• Eye pain

If you're experiencing these symptoms after you get your prism glasses, seek help from the professional or doctor who prescribed you the glasses. You might need to get them adjusted or get a new pair.

Do not try to diagnose the problem or fix the glasses yourself, as this could lead to late treatment which could worsen your vision!

Do I need prism glasses?

To find out if you need prism glasses, you need a thorough exam to find out.
Source: Ksenia Chernaya

Only an ophthalmologist or optometrist and an examination can tell you whether you need prism glasses.

Prism glasses are designed for those who experience symptoms caused by eye misalignment. Eye misalignment is a condition where your eyes are not aligned, causing them to see the same thing in a doubled or misplaced form – thus making focusing harder.

If you have eye misalignment, sometimes you might experience uncomfortable symptoms that require prism correction glasses to treat. They may include:

Headaches, dizziness & disorientation

Sometimes eye misalignment is the cause of those annoying constant migraines! When your eyes are not aligned, your eye muscles might keep trying to align them, resulting in a lot of tension that causes ongoing headaches, dizziness, and disorientation. Some people might also get motion sickness from it.

Double vision & 'blurred vision'

As its name suggests, double vision occurs when you see double of an image, where there should only be one.

When your eyes are not aligned, you'll see two separate images of the same object that stack on each other, leading to the name 'double vision'. The two images could be side to side or one could be above and one below.

Double vision can sometimes be confused with blurred vision. That's because double vision causes you to see two images that are slightly misaligned, and one image may be fainter, or less clear than the other. This can create a 'ghost image' effect which some people may confuse as simply 'blurred vision'.

Eye strain & fatigue

People with mild BVD often suffer from eye strain. This is because your eye muscles are working overtime to align themselves to create a clear and single image for your brain, leading to fatigue and eye strain.

Experiencing some of these symptoms alone doesn't necessarily mean that you have a medical condition, but if you suddenly have these symptoms, especially double vision and blurred vision, you should consult an ophthalmologist or optometrist immediately.

Are prism glasses what you need?

It may seem surprising that a slight misalignment issue can lead to so many uncomfortable symptoms. Fortunately, many people find that prism glasses can help correct these problems and allow the wearer to comfortably see again.

If you think you might need a pair of Prism glasses, be sure to talk to your eye doctor and book an eye exam.

Have you ever spent a day in the sun without wearing sunglasses, only to later find your eyes red, sore, and sensitive to light?

If so, you may have experienced sunburned eyes. This painful condition, photokeratitis or ultraviolet keratitis, can affect anyone outdoors without proper eye protection.

Also known as photokeratitis or ultraviolet keratitis, sunburned eyes can cause temporary vision loss. You may also feel some discomfort and sensitivity to light.

Let's look at what causes sunburned eyes, how to prevent it, and what to do if you have it.

What are the symptoms of sunburned eyes?

Prolonged exposure to the sun can cause your eyes to redness and inflammation. Source: U.S. News

Sunburned eyes can be a real pain—literally! One of the most common symptoms of this condition is redness, which can make your eyes look like they've been crying for hours.

You might find that your eyes are watering more than usual as they try to flush out the UV radiation causing the problem. But the discomfort doesn't stop there. Sunburned eyes can also be quite painful, with many describing it as a sensation compared to having sand in your eyes.

With sunburned eyes, you may also feel more light-sensitive than usual.

Vision loss caused by sunburned eyes can be severe enough to interfere with daily activities.

Even indoor lighting or the glare from a computer screen can be painful when your eyes are sunburned. However, the most concerning symptom of sunburned eyes is temporary vision loss. This symptom can occur when the cornea—the transparent, outermost layer of the eye—becomes swollen and distorted.

So why does UV radiation cause all these problems? The answer lies in the way that light interacts with the cells of the eye. Prolonged exposure to UV radiation can damage the cells of the cornea, leading to inflammation and other symptoms of sunburned eyes.

And unfortunately, this damage is cumulative—every time you expose your eyes to UV radiation without protection, you're increasing your risk of developing this painful condition.

How to best prevent sunburned eyes

The best way to avoid the pain and discomfort of sunburned eyes is to prevent it from happening in the first place.

Luckily, you can take a few simple steps to protect your eyes from UV radiation and reduce your risk of developing this painful condition. First and foremost, invest in a good pair of sunglasses or clip-ons that block 100% of UV radiation.

Make sure to research and choose a pair that offers adequate coverage.

When it comes to UV protection, not all sunglasses are created equal. Look for sunglasses labeled 'UV 400' or '100% UV protection' to ensure they provide the highest protection level possible.

But how do you know if your sunglasses are doing their job?

One way to test the UV-blocking effectiveness of your sunglasses is to use a UV light meter. This small device measures the amount of UV radiation that penetrates through your sunglasses. A UV light meter can determine the effectiveness of your sunglasses' UV-blocking capabilities.

Another easy way to tell if your sunglasses provide adequate protection is to check for a label that indicates compliance with ANSI (American National Standards Institute) standards for UV protection. In addition to wearing sunglasses, it's also a good idea to wear a hat with a brim or visor to further shade your eyes from the sun.

And, of course, the best way to prevent sunburned eyes is to limit your exposure to sunlight, especially during peak UV hours (typically between 10 a.m. and 4 p.m.

Transition lenses provide continuous protection against harmful UV rays.

Transition or photochromic lenses are a convenient option for preventing sunburned eyes. They darken automatically in response to sunlight and UV rays. These lenses contain photochromic molecules that UV light activates, causing the lenses to darken and protect the eyes from harmful UV radiation.

Transition lenses effectively prevent sunburned eyes, as they reduce the amount of UV light entering the eyes. Plus, they eliminate the need for multiple glasses or constantly switch between prescription and sunglasses.

These simple measures can help safeguard your eyes against the harmful effects of UV radiation and lower your chances of developing sunburned eyes.

Consultation and treatment of sunburned eyes

Your eye doctor can help determine the proper treatment for sunburned eyes.

If you are experiencing prolonged symptoms of sunburned eyes, seeking medical attention promptly to minimize the risk of long-term damage to your vision is essential.

Sunburned eyes will usually heal within a few days to a week. However, you can do a few things to ease discomfort and speed healing. One of the essential measures to maintain your eye health is to give your eyes a break and limit their exposure to bright light.

This means taking a break from activities that require a lot of visual concentration, like reading or working on a computer, and wearing sunglasses indoors to reduce the amount of light that reaches your eyes. Another critical factor for treating sunburned eyes is using eye drops to reduce inflammation and soothe discomfort.

Consult your eye doctor or pharmacist for the best eye drops for sunburned eyes.

Several eye drops can treat sunburned eyes, including lubricating and anti-inflammatory drops. Lubricating drops help moisturize the eyes and reduce dryness, while anti-inflammatory drops can help to reduce swelling and pain.

Staying hydrated by consuming ample amounts of water and reducing your alcohol and caffeine intake can aid in combating dehydration, which can worsen the symptoms of sunburned eyes.

In severe cases, your doctor may prescribe medication to reduce inflammation and prevent infection.

This is more likely necessary if you are experiencing vision loss or your symptoms have not improved after a few days of at-home treatment.

Protecting your eyes from the sun

Taking essential precautions, such as wearing sunglasses outdoors, can help prevent sunburned eyes.

Sunburned eyes can be painful and uncomfortable, leading to temporary vision loss and other long-term complications. Symptoms can include redness, pain, and sensitivity to light – typically from exposure to UV radiation from the sun.

Shielding your eyes from the sun's harmful UV rays is essential in preventing this condition. This can include wearing sunglasses that block 100% of UV radiation, wearing a hat with a brim or visor and avoiding prolonged exposure to sunlight during peak UV hours. If you experience symptoms of sunburned eyes, seeking medical attention is crucial to minimizing the risk of long-term damage to your vision.

By taking simple steps to protect your eyes from the sun, you can reduce your risk of developing sunburned eyes and other eye conditions associated with UV exposure. So next time you head out into the sun, grab a pair of UV-blocking sunglasses and a hat—your eyes will thank you!

Our eyes are exposed to light all the time.

It's such a regular occurrence to the point that we may not even notice how it affects our eyesight as time goes by.

However, light doesn't just affect your eye health, but your daily life too.

On that note, let's talk about the types of light sources that are the best and the worst for your eyes.

What is light (baby don't hurt me)

Light is how we can see everything around us.

What is existence without light?

We all know how light benefits us every day, but what is it exactly?

In basic terms, light is a form of electromagnetic radiation that the human eye can see. It travels in waves, and these waves carry energy that makes everything visible.

Without it, we'll be in the dark.

If you look at anything and anywhere right now, you'll notice different types of light sources.

There are too many of them to mention, so let's name some of the common examples:

• Incandescent bulbs
• LED lighting
• Full spectrum lighting
• Natural Light

How light sources can affect your eye health

Certain sources of light can damage your eyes and make them feel fatigued.

Eye health researchers have observed the following effects of different light sources on your eyes:

• The blue light from fluorescent bulbs and LED lighting can cause eyestrain and fatigue.
• Blue light can also disrupt your sleep cycle, as being exposed to it before bedtime could fool your body into thinking it's still daytime.
• Going out in direct sunlight without protective eyewear like sunglasses can damage one's eyes and heighten the risk of developing cataracts, photokeratitis, and macular degeneration.

The best light sources for your eye health

1. Incandescent warm bulbs

Warm light bulbs are relaxing and easy on the eyes.

Generally speaking, soft and warm light is easy on the eyes.

It also makes a space look more appealing and inviting.

For these reasons, interior designers often use incandescent warm bulbs in the living room, dining room, or bedroom.

If you have a preferred space in your home to relax and wind down, adding warm light to it can create that ambiance.

This type of light bulb also emits fewer UV rays, compared to bright white bulbs.

They're pretty cheap too, although they're not the most energy-efficient on this list.

If you opt for incandescent warm bulbs, be prepared for them to cost you a little more in the long run.

2. LED bulbs (no UV rays)

Nothing says 'energy-efficient' like LED bulbs.

As such, they can save you a lot of money on your power bill in the long run.

Plus, LED bulbs emit zero UV rays, making them the perfect light source for your eyes.

LED bulbs also come in different hues like cool white and soft white.

You're most likely to see them in kitchens, garages, and workspaces.

In a 2021 study, researchers found that cool white lights can stimulate focus in the workspace.[1]

The only slight catch with LED lighting is that it can cost a hefty price.

While it saves you a lot of money in the long run, LED bulbs are usually the most expensive option to shop for.

3. CFL bulbs

If you're looking for a light source that's both energy-saving and affordable, why not try CFL bulbs?

These emit fewer UV rays and consume less energy, compared to incandescent and fluorescent light bulbs.

Also known as compact fluorescent bulbs, these come in different color temperatures, sizes, and wattages.

However, take note that CFL bulbs contain a tiny amount of mercury.

No need to fret though, since its mercury level is so low that it won't harm any adults.[2]

4. Full spectrum lighting

Full spectrum lighting is great for people who need color accuracy in their work, like artists. How so?

It's because an object's color can look different under different light sources.

Under full spectrum lighting, you can see colors the way they're supposed to look.

If you work in photography and graphic arts, this option is perfect for you.

5. Filtered natural light

Being exposed to a certain amount of daylight is good for your health.

However, if you don't want to deal with harmful UV rays, look into getting filtered natural light instead.

Studies have shown that filtered natural light is excellent for working people, as it allows them to focus and perform better.

Your body clock also responds better to natural light, making you more energetic at peak working times of the day.

The worst light sources and why you should avoid them

1. Fluorescent bulbs

Fluorescent light bulbs emit the most UV rays among artificial light sources.

It's no secret that fluorescent bulbs emit the most UV rays than any other artificial light source.

They're pretty bad for your eyes too, since they cause eyestrain and fatigue.

2. Direct sunlight

Direct sunlight doesn't only burn your skin, it damages your eyes too.

Among many others, it puts you at risk of eye cancer, cataracts, and macular degeneration.

In severe cases, direct sunlight can even lead to blindness.

3. Blue-light sources

Overexposure to blue-light emitting digital screens can lead to dry eyes, damaged cells in your retina, as well as cause vision problems like age-related macular degeneration.

Minimizing the impact of bad light sources

Wearing sunglasses and glasses with a blue-light filter are the best ways to protect your eyes from unhealthy light sources.

 

Wear sunglasses outside

When it's hot and sunny outside, don't go out without a pair of sunglasses.

It's one of the most basic yet effective ways to protect your eyes, aside from a wide-brimmed hat.

You can even go for multi-purpose glasses, such as our Swift frames.

This pair comes with clip-on tinted lenses, so you can easily transition them from prescription specs to sunnies.

See Swift

Use glasses with blue light filters

If you're attached to your phone or laptop, the least that you can do is protect your eyes with blue light glasses.

These special spectacles from Door2USA Prescription Glasses have blue light filters integrated into the lenses.

By wearing them, you can reduce common side effects like fatigue, headaches, neck aches, and eyestrain.

Here's one of the newest designs from our blue light range:

Use dark mode on mobile devices

You can reduce the glare from your mobile devices by using dark mode, especially during the night.

Doing so helps you squint less and minimizes the effects of blue light on your eyes.

Adjusting screen brightness

Look at the time and where you are, then adjust your screen brightness accordingly.

For instance, if you're outside in the daytime, it's fine for your phone to be in full-brightness mode.

However, it's best to dial down the brightness at night.

To save time, look into activating your phone's auto-brightness feature, which adjusts your screen brightness according to your environment.

The best light sources make all the difference

As you can now see, the light you surround yourself with can either complement or disrupt the balance of your life.

It can also affect your eye health, with the repercussions sometimes being undetectable until it's too late.

Now that you know the best light sources for your eyes, the next step in keeping your eyes healthy is to get regular eye exams.

And of course, if you enjoyed this content, do check out Door2USA Prescription Glasses' blog for more!

References

• 'Effect of warm/cool white lights on visual perception and mood in warm/cool color environments', Shahidi R, Golmohammadi R, Babamiri M, Faradmal J, Aliabadi M. (2021)
• 'Mercury in Compact Fluorescent Lamps', European Commission.

Did you ever try on your grandparent's glasses when you were a kid and see your eyes distorted up to five times their usual size? Those now-vintage glasses likely had extremely thick lenses and a high prescription.

Luckily, times have come through for us spec-wearers, as newer technology means that a high prescription no longer requires ultra-thick lenses.

Today, we'll dive into the best frames for high prescriptions, specifically high index lenses.

What are your options if you need a high prescription?

Your eyeglass prescription can affect the types of glasses you're able to wear. This is especially the case if your optometrist has given you a high prescription – which means that your glasses will need to work a little harder to correct your vision.

However, eyewear advancements have opened up many more options available for you. When picking glasses for higher prescriptions, your two main options are:

• You opt for thinner, high-index lenses.
• You opt for regular lenses and simply choose a frame design that's suitable for higher prescriptions.

We'll be explaining both options in more detail.

What are the thinnest lenses for high prescriptions?

The thinnest lenses for high prescriptions are generally high-index lenses.

The key word when it comes to high index lenses is efficient. These lenses are made from a more sophisticated material that's designed to bend the light more efficiently to accommodate a high prescription, which allows lenses to be far thinner than regular index lenses. It's kind of like the optometry version of "work smarter, not harder".

This means that having a high prescription doesn't mean you are doomed to carry the load of super-heavy lenses. High index lenses come to the rescue for anyone with high prescriptions, astigmatism, and both high near and farsightedness.

There are many reasons why people opt for high-index lenses:

• Their more comfortable thick lenses housed in full frames can be taxing on the nose and ears. That extra weight can cause dents in the nose and achy ears after a long day of wear. High-index lenses, on the other hand, feel weightless and won't cause those annoying red marks.
• They look great while oversized eyes are beautiful, we don't always want our facial features to be distorted by our glasses. Older prescription lenses tend to magnify or minify the eyes and result in an inaccurate view of the wearer's face. High-index lenses tell it like it is! Due to their super-thin construction, they won't magnify or distort the eyes as much, providing a clear window to your peepers.
• They're very versatile high index lenses and their fabulously thin constructions can saunter into almost any frame. If you've been dreaming of that ultra-sleek, lightweight rimless aesthetic, you and your high prescription are in luck.

Here at Door2USA Prescription Glasses, we offer a range of high-index lenses that we can add to almost any frame you desire.

What frames can you wear with high-index lenses?

Traditionally, high prescriptions meant thick lenses, which meant rimless and semi-rimless frames were out of the question. Semi-rimless frames were simply not strong enough to securely hold a thick lens.

High praise to the inventors of high index lenses, as they allow high prescription users to rock almost any frame style. The thin nature of high-index lenses means rimless and semi-rimless glasses can be a viable option. With trends moving toward lightweight, delicate options, this is great news.

So, since there are almost no restrictions on the frames you can wear, the next step is to find the right ones. More on that at the end of this article!

The best frames for high prescriptions (with regular lenses)

Despite their many benefits, high index lenses are not for everyone. Your budget may not allow for high index glasses, or you may have been recommended to go for a lower index. Never fear, there are options out there for you.

Here are some top tips to follow which will help you find the most flattering frames to accommodate your thicker lenses.

1. Opt for plastic or acetate over metal

Metal frames are thin, meaning a thicker frame won't be entirely encased by the frame, further accentuating the thickness.

Plastic and acetate frames, however, are naturally thicker and fully conceal the edge of the thicker lens. Thick plastic frames allow bold pops of color or interesting patterns.

2. Full frames are best

Rimless and semi-rimless frames don't really go hand-in-hand with thick lenses for high prescriptions. The thickness of the lens is far more obvious when the edges are left exposed. Plus, the lightweight nature of a rimless or semi-rimless style is lost on the thicker frame.

Play to the strength of the lens and go with a full frame that conceals the thick edges of the lens. This is a good thing! It means you can explore unique colors and patterns to enhance your features or even make a statement.

3. Try smaller frames with a smaller lens area

The smaller the frame, the smaller the lens area will be, minimizing the look of a thicker lens. This helps to reduce the chance of distorting the eye and upper cheek area of the face. We love small, round frames with thicker lenses as they sit neatly on the face and especially flatter more angular face shapes.

What's more, the lack of angles and edges of round glasses reduces the opportunity for the lens thickness to be visible from the outside.

How to always choose a frame style you'll love

Whatever option you go for – you'll always want to make sure you find a frame that you love. Glasses are perched upon your face for most of the day so it's important you're happy with your choice.

Here are two fail-safe tips to help you.

1. Consider your face shape

Face shape is one of the key considerations when finding frames, as some are flatter and some may detract from your features.

The right pair of glasses will balance out your features, adding angles to roundness, and roundness to angles (to put it simply). For example, rounder faces suit geometric or square frames. Triangular faces, on the other hand, look great in wide, large frames that balance a smaller forehead with a bolder jawline.

To find a fit for your face shape, check our guide.

2. What's your overall daily aesthetic?

Now that you've found the right silhouette, it's time to consider the overall aesthetic in terms of color, pattern, and material.

What makes you feel most like you? While bold neon plastic frames may be fun for a weekend night out, you may feel overpowered by them during the work week. To compromise, you could try a sweet pastel shade that adds color without the intensity. Or, a pair of amber tortoiseshell full frames could be ideal for bringing out the warmth in your complexion while going with any eye makeup look.

Have a look through our curated collection at Door2USA Prescription Glasses and play around with our Virtual Try-On to see what you love most. Your new favorites are waiting!

Are you struggling to read signs? Or maybe you see 'starbursts' at night.

Most people experience a form of blurred vision at some point in their life. The fix can be as simple as putting on a pair of glasses. But sometimes, the cause can be something more serious.

It's important to know when your blurred vision needs some extra attention. The tricky part is that blurred vision can have many causes, and can present in many ways.

What does blurred vision feel like?

Blurred vision makes things appear fuzzy and out of focus and looks like a "soft focus" filter. This can happen up close, far away, or at all distances.

Blurred vision is different from having double vision, distorted vision, or a blind spot (i.e. a missing or dark area in your vision). Many people also confuse blurred vision with cloudy vision, where colors look muted, and everything is hazy and foggy. However, these are all distinct conditions.

Today, we'll be discussing the causes of blurred vision.

When blurred vision is a simple prescription fix

Most cases of blurred vision are caused by an existing refractive error. This refers to an imperfection in the shape of your eye and can be corrected with glasses or contact lenses.

Myopia, or short-sightedness, happens when your eyeball is too long, which causes objects in the distance to become blurred while objects up close remain clear. This is because the light is focused in front of the retina (the light-sensitive layer in the back of your eye).

Source: Britannica

On the other hand, long-sighted people (also known as hyperopia) have shorter eyeballs and struggle to see things up close because light focuses behind the retina.

You may also have astigmatism, where your cornea (the front of your eye) isn't perfectly round and causes blurred vision at all distances. Astigmatism is more obvious when driving at night, as headlights and streetlights look scattered – often described as 'starbursts'.

If you're experiencing blurred vision and you have myopia, hyperopia, or astigmatism you will likely need glasses or contact lenses to fix it. Your eye doctor will conduct an eye exam to determine your prescription – a document that you'll reference when buying a pair of glasses. Many eyeglass retailers, like Door2USA Prescription Glasses, offer a wide range of frames to suit any taste and lifestyle.

If you're not into glasses, you could consider looking into surgical options like LASIK.

As we get older, it gets harder and harder to focus on nearby objects, causing most of us to pull our phones further away to read them. This is called presbyopia which begins in your 40s and progresses until your mid-60s. As with everything else in our bodies, our focusing system weakens as we age.

If this sounds like you, you might need some reading glasses while doing up-close tasks.

Other causes for blurred vision

Sometimes it's not quite as simple as getting new glasses. Other causes could include:

• Cataracts cause blurred vision which is worse at night and may make you more sensitive to glare. Lots of people with cataracts see "halos" around lights and their vision appears faded and yellowed. Cataracts can occur with age but can also be caused by an eye injury, medication, or something you are born with. Some cataracts cause completely blurred vision while others will only blur part of your vision. When cataracts become severe, they can be removed by an ophthalmologist.
• Migraines can cause blurred vision, blind spots, and distorted auras that look like a kaleidoscope. Flashes, tunnel vision, and shimmering zig-zag lines are also common in migraines. Most of the time migraines affect both eyes, so if you experience vision changes in only one eye it's a good idea to see an optometrist to rule out other causes.
• Dry eyes can make your eyes irritated, watery, and blurred. Having dry eyes can change the surface of your tear film (the tear layer coating the front of your eye) and distort your vision. Usually using lubricating drops helps, but if it persists you should seek medical advice.
• Pregnancy causes fluid retention which can change the shape of your cornea and cause distorted vision. Usually, this goes away after pregnancy and your eyes return to normal. If the blurred vision is only mild and doesn't bother you, you may not need glasses to fix this. However, if your blurred vision is accompanied by temporary vision loss, light sensitivity, or flashes of light, you should seek medical help as it could be a sign of preeclampsia.
• Eye injuries might damage and distort the front of the eye, causing blurred vision. In more severe injuries you might notice flashes of light or floaters (squiggly dark spots) in your vision and your vision could be doubled. Minor eye injuries can be treated with cold compresses, flushing the eye, or eyedrops, but if you have changes to your vision after a head or eye injury, it's important to be assessed as soon as possible to make sure that everything is okay.

When might blurred vision be a sign of something serious?

Sometimes blurred vision can be a sign of something more serious that may lead to permanent vision loss or significant health risks. These include:

• Glaucoma causes a gradual loss of peripheral vision, which can eventually lead to tunnel vision and even blindness. Performing daily tasks can be difficult for people with glaucoma due to blurred vision, glare sensitivity, blind spots in their vision, and colors appearing dull.
• Diabetic retinopathy happens when the eye doesn't have enough blood circulation and makes new blood vessels that are very weak and leak into the retinal tissue in the back of the eye. This makes the retina swell and causes blurred vision. If this happens for a long time, scar tissue can form which causes permanent vision loss and even retinal detachment.
• Age-related macular degeneration (AMD) is a common cause of permanent vision loss in people aged over 55 years. As AMD progresses, it can cause a patch of blurred central vision which gets bigger without treatment. You might also have trouble seeing things under dim light and you may find that straight lines appear distorted and wavy.
• Retinal detachment is when the retina pulls away from the choroid (the tissue underneath the retina that provides oxygen and nutrients to the eye). This will make your vision very blurred, and you might notice lots of new floaters, flashes of light, or a dark "curtain" in your vision (which is your retina folding over). If you have these symptoms, you must seek urgent medical help as this progresses quickly and there is a risk of permanent vision loss.
• Systemic conditions can also present with blurred vision alongside other symptoms. Some serious conditions that may be responsible for your blurred vision are multiple sclerosis, stroke, or cardiovascular disease. Typically, these are accompanied by other symptoms such as dizziness, weakness or numbness in the arm, headaches, or vision loss.

Can blurred vision be prevented?

The most effective way to prevent blurred vision is by having regular eye exams so that any simple or more serious conditions can be picked up on and treated sooner. This is especially important if people in your family have eye conditions.

It's also important to take care of your general health by exercising regularly, eating a rich diet (omega-3 and leafy greens are important!), and avoiding common risk factors such as smoking.

For the most part, blurred vision can be prevented, but sometimes it's just a part of aging or it's simply due to your genetics, especially when it comes to refractive errors.

In saying that, in recent years a lot of research has indicated that taking regular breaks from near work and spending time outdoors can help prevent short-sightedness in children.

Specialized spectacle lenses, atropine (a type of eye drop), and orthokeratology (a contact lens that reshapes your cornea in your sleep) among other options have also been shown to be effective in controlling myopia.

When to see a doctor about your blurred vision

If you experience a sudden onset of blurred vision, or persistent blurred vision, along with any of the following signs, you should seek medical help:

• Severe eye pain
• Headaches
• Complete or partial vision loss
• Weakness/numbness in one arm
• Dizziness or loss of balance
• Drooping face
• Slurred speech

If in doubt, it never hurts to see a professional to put your mind at ease!

References

• "Refractive Errors", National Eye Institute
• "Prevalence, Risk Factors, and Impact of Undiagnosed Visually Significant Cataract: The Singapore Epidemiology of Eye Diseases Study", Plos One
• "Ocular Changes During Pregnancy", Journal of Current Ophthalmology
• "Symptoms Related to the Visual System in Migraine", F1000 Research
• "Dry Eye", American Optometric Association
• "Eye Injuries", Cleveland Clinic
• "What Do Patients with Glaucoma See? Visual Symptoms Reported by Patients with Glaucoma", The American Journal of the Medical Sciences
• "Diabetic Retinopathy", American Optometric Association
• "Age-Related Macular Degeneration", National Eye Institute
• "Retinal Detachment", National Eye Institute
• "Blurred Vision", British Medical Journal
• "Nutrition and Eye Health", Nutrients
• "Myopia Treatments: How to Choose and When to Use?", Review of Optometry
• "Red Flags in Neuro-Ophthalmology", Community Eye Health Journal

Have you ever wondered what eye doctors do when they shine that tiny light in your eyes? The tool they're using is called a pupilometer.

In addition to measuring pupil size, a pupilometer can provide a wealth of information about a person's eye health. Let's take a closer look at this tool and the invaluable insights it can provide.

The pupilometer helps measure pupil size

Automated pupilometers offer precise measurements without human error. Source: Hansrajnayyar

A pupilometer, which comes in two main types—manual and automated—is a specialized device used to measure the size of a person's pupils. Manual pupilometers require the user to visually assess the size of the pupil using a ruler or other measuring tool.

In contrast, automated pupilometers employ sophisticated technology to measure pupil size automatically and accurately. Pupilometers emit a beam of light into the eye, causing the pupil to constrict, and then measure the pupil size in millimeters.

A pupilometer provides valuable insights into a person's eye health and can aid in diagnosing various conditions.

When an eye doctor determines a person's eye prescription, one of the factors they consider is the size of the person's pupils. The size of the pupils affects the amount of light entering the eye and how it focuses on the retina. This, in turn, can impact a person's vision, such as their ability to see in dim light or to focus on near or distant objects.

It can also be a clue to any underlying eye conditions. If a person's pupils are consistently more prominent than the average size, it may indicate a potential medical issue that requires further evaluation.

How we make use of the pupilometer

In the medical field, pupilometry aids in various diagnostic purposes.[1] Alterations in pupil size may indicate neurological disorders such as Parkinson's disease, Alzheimer's disease, and multiple sclerosis. We can also use it to help assess traumatic brain injury, as changes in pupil size can indicate changes in intracranial pressure.

Pupilometry is a fascinating tool that goes beyond the medical field. Source: KBV

We can also use pupilometry in various non-medical settings. For example, pupilometers can measure cognitive load and mental effort.[2] By tracking changes in pupil size, researchers can identify when a task becomes more complex, helping to inform the design of user interfaces and other applications.

Pupilometry can do more than just measure your pupil size. It can also assess your arousal levels and emotional responses, offering valuable insights into human behavior. These insights can be particularly useful in marketing and advertising, helping to inform strategies and connect with audiences on a deeper level.

Other ways we can measure pupil size

When it comes to measuring pupil size, there are several techniques that eye care professionals and researchers use: direct observation, pupillography, and infrared pupillometry.

Direct observation of the pupils

The direct observation method visually inspects the pupil and compares its size to a reference object. Source: Eye Emporium Opticians

Direct observation is the simplest and oldest technique for measuring pupil size. This method involves using a ruler or other measuring tool to assess the size of the pupil visually.

While this technique is straightforward and requires no special equipment, it is also prone to errors due to differences in lighting conditions and variability in the observer's perception.

Pupillography uses light to track pupil response

Pupillography involves placing a light source close to the eye and tracking the pupil's response to changes in light.

Pupillography is a formal method that employs an infrared video camera and computer software to record and measure pupil reactions.

It helps determine what causes specific pupil reactions and allows for accurate measurements when preparing for some eye procedures.

Infrared pupillometry helps evaluate light reflex in the pupils

Infrared pupillometry measures change in pupil diameter in response to light intensity changes using infrared light. Source: IDMed

Infrared pupillometry primarily evaluates the pupillary light reflex. It also monitors neurological conditions like traumatic brain injury. This technique can also offer valuable insights into the autonomic nervous system's function, as fluctuations in pupil size frequently signal changes in arousal and stress.

Pupilometers aren't a perfect solution

Users should be aware of the limitations and considerations to ensure accurate measurements and interpretation of results.

Pupilometers serve many applications, but there are some limitations and considerations that come with their use:

• AccuracyPupilometer accuracy may be affected by several factors. However, only accurate measurements can lead to correct diagnosis or treatment.
• Ambient lightThe ambient light in the environment can impact pupil size measurements. Controlled lighting conditions should be consistent during the assessment.
• Subject cooperationThe accuracy of the pupilometer depends on the subject's cooperation and ability to focus on the target provided by the device. Distractions, discomfort, or anxiety may lead to inaccurate measurements.
• Eyelid interference some cases, subjects may have difficulty maintaining an open eye, or the eyelids may partially cover the pupil, leading to inaccurate measurements.
• Ocular conditions Certain ocular conditions, such as corneal opacities, cataracts, or severe ptosis, can interfere with the accuracy of the measurements.
• Pupil size variation some individuals naturally have smaller or larger pupils, which can lead to difficulty obtaining accurate measurements.
• Medications and substancesSome medications and substances, such as alcohol or illicit drugs, can influence pupil size and reactivity, potentially affecting the accuracy of the measurements.

Pupilometers aid us in understanding the human body and mind

The pupilometer is a fascinating tool that provides valuable insights into eye health, cognitive function, and emotional responses. As pupilometry technology advances, new and improved methods for measuring pupil size and interpretation are on the horizon.

In optometry, the pupilometer is a crucial tool that enables eye care professionals to provide the best possible care for their patients' vision and overall eye health. Furthermore, pupilometry has many applications, providing valuable insights into the human body and mind.

Overall, the pupilometer is a fantastic tool that can provide eye care professionals, researchers, and anyone curious about their eye health with invaluable insights. It enables us to gain a deeper understanding of how our pupils react to different stimuli, shedding light on our cognitive function and emotional responses.

References

• ' The use of pupillometry in joint and connective tissue diseases', Bertinotti L, Pietrini U, Del Rosso A, Casale R, Colangelo N, Zoppi M, Matucci-Cerinic M. (2002)
• ' Measuring cognitive load: performance, mental effort and simulation task complexity', Haji FA, Rojas D, Childs R, de Ribaupierre S, Dubrowski A. (2015)

A slit lamp exam is a crucial diagnostic test that eye doctors use to check your eyes for problems.

This test can help detect eye conditions like cataracts and glaucoma before they worsen and cause vision loss.

You can treat issues quickly to prevent vision loss if you discover problems early.

Let's explore the significance of the slit lamp exam in greater detail.

What is a slit lamp exam?

Doctors can adjust the light in a slit lamp microscope to see different eye areas. Source: Imami

Eye doctors conduct a slit lamp exam to examine your eye's different parts closely.

They use a unique slit lamp microscope, a specialized instrument combining a high-intensity light source and a magnifying lens.

It shines a narrow beam of light into your eye, allowing them to see things more clearly.

This exam helps doctors check the front part of your eye, like the cornea and the lens. They can also look at the back of your eye, like the retina and the optic nerve.

This test is essential because it can help doctors find any problems with your eyes before they worsen and cause vision problems.

How a slit lamp exam works

The slit lamp microscope provides greater detail than the naked eye alone. Source: Healthline

During a slit lamp exam, the eye doctor will have you sit in front of the machine with your chin resting on support and your forehead against a bar.

They will then shine a narrow beam of light onto your eye and use the slit lamp microscope to look at the different parts of your eye.

The front part of your eye, like the cornea and the lens, is examined for abnormalities. These abnormalities include scratches, infections, or cataracts.

The eye doctor will also check the back part of your eye, like the retina and the optic nerve.

Compared to other eye examination methods, such as a regular eye exam or a retinal exam, the slit lamp exam provides a more detailed view of the eye's structures.

The results can help the eye doctor diagnose and monitor different eye conditions more accurately. It's also non-invasive and painless.

Why slit lamp exams are necessary

In addition to detecting cataracts, the slit lamp exam is also used during recovery to monitor healing. Source: Insight Eye Clinic

Supporting cataract surgery

The slit lamp exam can also support eye surgeries like cataract surgery. Before the surgery, your eye doctor will perform a thorough slit lamp exam to get an in-depth look at the structures of your eyes.

This same diagnostic technique will be used throughout recovery to ensure everything is healing correctly.

Posterior segment condition diagnosis

The slit lamp exam is beneficial for examining the eye's posterior segment, including the retina, optic nerve, and vitreous.

This part of the eye is difficult to see with a regular eye exam and requires a more detailed examination.

Possible diagnosis with a slit lamp exam

A slit lamp exam is a standard procedure in ophthalmology to diagnose and monitor various eye conditions.

Here are some of the possible diagnoses from a slit lamp exam:

Cataracts

The clouding of the lens, which characterizes cataracts, can be visualized in detail during a slit lamp exam.

Glaucoma

A slit lamp exam is essential to glaucoma diagnosis and monitoring, as it helps detect glaucoma by allowing the doctor to observe the optic nerve head and retinal nerve fiber layer.

Early detection of age-related macular degeneration can help preserve vision and improve overall eye health. Source: VRMNY

Macular degeneration

A slit lamp exam can also aid in diagnosing macular degeneration by allowing doctors to examine the macula.

That's the part of the eye that is responsible for central vision.

Diabetic retinopathy

Diabetic retinopathy is a condition that can occur as a complication of diabetes and can cause damage to the blood vessels found in the retina. When left untreated, it can result in vision loss.

A slit lamp exam can help detect diabetic retinopathy by revealing changes or abnormalities in the retina's blood vessels.

A slit lamp exam can reveal signs of an ulcer, such as inflammation or visible indentation. Source: Dean McGee Eye Institute

Corneal ulcers

A slit lamp exam can help diagnose corneal ulcers by revealing the location and size of the ulcer.

Conjunctivitis

Conjunctivitis, or pink eye, can be diagnosed using a slit lamp exam. During this exam, an eye doctor can identify signs of inflammation in the conjunctiva.

Some potential symptoms include redness, swelling, or discharge.

Corneal abnormalities

A slit lamp exam can help diagnose corneal abnormalities such as scars, infections, or dystrophies by providing detailed visualization of cornea layers.

In short – slit lamp exams are essential for eye health

Slit lamp exams can help catch different eye conditions before they cause serious problems. Source: Medical News Today

A slit lamp exam is a valuable diagnostic tool that allows eye doctors to examine the eye's structures in detail and detect various eye conditions.

It can help preserve your vision and improve your eye health by detecting and treating these conditions early.

Keep your eyes healthy and functioning by scheduling regular eye exams — including a slit lamp exam.

Early detection of potential conditions can help you preserve clarity and longevity in sight.

References

• 'Slit Lamp Exam', Healthline.
• ' Uses of the Slit Lamp Parts of the Slit Lamp'. University of Illinois in Chicago.
• ' Using the slit-lamp to perform cataract surgery on upright patients'. Journal of Cataract and refractive surgery.
• 'Recognising and managing diabetic retinopathy'. National Library of Medicine.
• 'Keratitis'. Mayo Clinic.
• 'Slit Lamp Microscopy'. Science Direct.

If you're reading this on an electronic device, you're being exposed to blue light at this very moment!

It's impossible to escape sources of blue light, whether it's from gadgets like our phones or laptops, or the fluorescent lightbulbs overhead.

This leads us to the million-dollar question: What exactly is blue light and is it bad for you?

In this article, we'll shed light (pun intended) on everything you need to know about blue light and how you can protect yourself from overexposure.

What is blue light anyway?

Blue light falls on the visible light spectrum. It's one of the seven different colored lights that come together to make up white light – that is, the kind of light that is emitted from sources like the sun and electronics.

Even though it's impossible to discern blue light from white light through the naked eye, shining a torch through a prism will visibly refract white light into all seven colors of the rainbow.

Blue light is one component of white light.

Among these colors, blue light is known for having the shortest wavelength and highest energy – which coincidentally, is perfect for deflection in the earth's atmosphere. It's what gives the sky the baby blue hue that we all know and love!

White light – and by extension, blue light – is everywhere around us at all times. The biggest natural source of white light is the sun. Other artificial sources of white light include light-emitting diodes (LED lights), fluorescent lights, and electronic devices.

This means that, from the moment we're born, we're constantly surrounded by different forms of blue light. Even when we switch off our devices!

While this might sound alarming, it's nothing to worry about. The world is constantly surging with all kinds of invisible electromagnetic energy, of which blue light is just another wave.

In comparison to Ultraviolet (UV) rays, which can severely damage your skin and eyes through prolonged exposure, the effects of blue light from digital devices can be considered relatively mild.

Is blue light bad for my health?

While the effects of overexposure to blue light may not be extremely damaging, it's still a part of our lives that we should be vigilant about, especially in a world that's becoming increasingly digital.

Here are some of the negative effects that blue light has on us:

1. It's a major culprit behind digital eyestrain

Staring at a blue-light emitting device can cause eyestrain.

The number one cause for concern when dealing with blue light is that it's linked to eyestrain and computer vision syndrome.

Research has proven that when we use blue-light-emitting devices such as our phones or computers, we tend to blink less, providing our eyes with less moisture than they would otherwise have.

Due to this, you might notice discomfort when looking at a screen, such as dry or tired eyes, and even headaches or migraines.

While these problems may not seem like much cause for concern, it should be noted that over a long period, the effects may compound and amplify, leading to other, bigger problems, such as age-related macular degeneration (AMD) and an increased likelihood of contracting eye diseases.

2. It may be why you toss & turn on sleepless nights

Overexposure to blue light, especially during evenings or at night, can also disrupt our sleep cycle and patterns.

Blue light is known to help regulate the body's circadian rhythm, also known as your sleep-wake cycle. Before the invention of artificial blue light sources, the presence of blue light from the sun meant that it was still daytime, and as such, our bodies would be stimulated to stay awake longer.

However, the presence of phones and laptops late at night can fool a body's light sensors into thinking it is still daytime, which leads to problems such as a reduction in the production of melatonin (a hormone inducing sleepiness), insomnia or restless sleep.

3. It's been linked to obesity, heart disease, and diabetes

A study by Harvard suggests that the consumption of blue light at night may be indirectly linked to deadly diseases such as diabetes, heart disease, and obesity.

While further studies are required to definitively confirm the connection between blue light and these diseases, findings from existing research so far seem to support this link.

The study showed that when a group of participants' circadian cycles slowly shifted, their blood sugar levels rose to a dangerous pre-diabetic state. Additionally, their levels of leptin, a hormone that provides the feeling of being full after meals, were decreased. While both of these changes in hormone levels may not be the outright cause of diabetes and obesity, they seem to at least be a part of the problem.

Furthermore, the disruption of one's circadian cycles may also lead to shorter sleep times or restless sleep, which in turn has been linked to higher chances of depression, diabetes, and heart disease.

Wait… Are there any health benefits of blue light?

Despite all of the negative effects that late night or overconsumption of blue light may cause, it's important to remember that blue light itself is not necessarily bad for your health. A healthy dose of blue light during the daytime may even be to your benefit.

As we've mentioned, the presence of blue light triggers sensors in our bodies to keep us awake, so it should come as no surprise that it helps to boost alertness and improve your reaction times.

Additionally, there's evidence of blue light being able to help improve one's memory and cognitive functions, as well as uplift moods.

While these benefits may not make up for the potential risks and adverse side effects of blue light, it's best to remember that blue light may do more harm at night. During the daytime, the presence of blue light is inevitable and even beneficial.

3 ways to protect yourself from too much blue light

Is it possible to protect ourselves from blue light?

Even though blue light is everywhere around us, there are still steps you can take to limit your exposure to it.

1. Turn off your devices at night

The easiest way to limit your exposure to blue light is to go completely cold turkey and turn off all your devices once the clock strikes a certain hour.

This way, the only blue light that you may come into contact with would come from your overhead lights, and even so, it won't be long before they're turned off for a good night's rest.

If that's too difficult, there are other ways of limiting your blue light intake. For instance, you could set daily reminders of your blue light consumption on your phone to ensure that you remember to disconnect.

Besides that, you could also pick up evening hobbies that don't involve electronic devices, such as reading or knitting, or even playing board games with any people you live with.

2. Grab a pair of blue light blocking glasses

Door2USA Prescription Glasses Blue Block Lens.

Another way to protect yourself from blue light is to purchase a pair of blue light blocking glasses.

This tip is especially useful for those who need to spend a lot of time in front of screens, such as office workers or students. These glasses can filter out blue light and reduce the amount reaching your retinas.

These glasses may also reduce some of the adverse effects listed above, such as eyestrain, allowing you to focus for long hours without any of the negative consequences.

These days, it's possible to get blue light glasses in both prescription and non-prescription forms – which means you can reap their benefits whether you need glasses or not.

At Door2USA Prescription Glasses, most of our frame designs come with the option of blue light blocking lenses. Go ahead and check out our collection!

3. P/S: Remember to take breaks!

Don't forget to take breaks from your screen!

Another way to reduce blue light intake is to take breaks more frequently.

Instead of staring at your devices for hours on end, it would be better for your eye health if you took some time to stare at a faraway (preferably non-blue light-emitting) object.

If you're ever in doubt, just remember the 20/20/20 strategy, where you should ideally stop work every 20 minutes to focus on an object 20 feet away, for 20 seconds. In addition to reducing your blue light consumption, this strategy can also help to decrease eye strain and potentially even increase your productivity.

So yes, blue light protection matters!

All in all, even though blue light may be beneficial during some times of the day, it's important to remember that it can still adversely affect our eye health and overall well-being, especially if consumed during hours when we should be resting instead.

Now that you know everything there is to know about blue light, don't forget to spread the word to your friends and family members so they too can protect themselves!

Feeling tired, dizzy, and headache-y after long periods in front of the computer? You could be suffering from Computer Vision Syndrome (CVS).

CVS plagues most of us and we just don't know it. This article will tell you everything you need to know about CVS and the 5 ways you can ease or prevent it from disrupting your life.

What is computer vision syndrome?

Computer Vision Syndrome is also commonly labeled "digital eye strain". It's a combination of eye/vision-related problems that can affect you when you spend long periods on screens. Although the term references computers specifically, you can suffer from these troubles regardless of whether you're on a tablet, phone, or laptop. Any screen can cause these issues!

So why are the evil screens affecting our vision so much? The American Optometric Association states that CVS comes from the way our eyes behave when faced with the glare of a computer.

Your eyes are working hard when working on screens for long periods. They're hyper-focusing on fuzzy text, batting off that bright glare and lessening their blink rate. All entirely unconsciously but it creates discomfort and pain.

Think you might be suffering from CVS yourself? The symptoms of Computer Vision Syndrome are:

• Eye dryness or watery eyes
• Headaches
• Blurry vision (unfocused vision)
• Eye fatigue
• Double vision
• Neck and shoulder pain

5 ways to ease or prevent computer vision syndrome

It's likely that you've had a CVS episode and not realized it. It's extremely common and deceptively subtle. But don't worry!

The following tips will both help you ease any current symptoms you're experiencing and prevent you from having computer vision-related issues in the future.

1. The 20-20-20 rule

To avoid digital eye strain, eye specialists recommend a technique called the 20-20-20 rule. The idea is that every 20 minutes, you look away from your computer and 20 feet into the distance for 20 seconds.

What's the science behind this? Well, eye strain is caused by sustained focusing up close on screens. It can take just 2 hours to cause computer vision syndrome symptoms. The 20-20-20 rule encourages you to relax your eyes regularly.

It takes around 20 seconds for your eyes to completely relax. The 20 feet thing? It's not an exact science so don't worry if you don't have a tape measure to hand. Simply look at a distant object. If you have a window, look across to the next building or tree and soften your gaze. This will be enough to prevent your eyes from getting tired.

2. Reposition your laptop

For optimal comfort, there's a scientifically-backed way to set up your desk. Slouching and neck strain contribute to CVS. So does having your monitor too close or too far away from you.

Here are some top tips to follow:

• Common to popular belief, your computer monitor should not be at eye level. It should be a little below eye level. Around 15 degrees below. If you use bifocal glasses, lower the monitor further so that you don't have to move your head too much to see the screen well.
• Your monitor should be between 20 and 26 inches away from your face.
• For bonus comfort, tilt your screen so that the top of the screen is slightly further away from you than the bottom.

3. Fight the glare

To fight the glare, you need to be mindful of the lighting sources in your room and the brightness of the screen.

Let's start with the lighting in your room. To ensure that your computer has as few reflections as possible, make sure it is not positioned in front of a window. In other words, you don't want the sun to directly shine on your computer screen.

Artificial lights directly overhead of your monitor can also cause glare on your screen which makes your eyes work harder to see clearly. Ceiling suspended indirect light is best.

If you can't avoid the glare from your room position, you can purchase glare filters that cover your screen. You can also seek out a matte monitor that lessens the reflection.

Next, let's talk about the brightness of your monitor. Adjusting your settings is paramount for a comfortable viewing experience. This could mean adjusting the color profile and contrast. If not, be sure to adjust the brightness of your monitor according to your needs.

Most computers come with an inbuilt blue light filter that casts an amber light on your screen at a certain time of day in the evening. You can use that function to customize your viewing experience.

Lastly, blue light glasses can help with lessening the glare from computers too. They have the added benefit of easing eye strain and improving your sleep.



All our Door2USA Prescription Glasses glasses come with blue-light-blocking technology built into their lenses and are great for everyday use. Check out our collection!

4. Take regular breaks

You may think that you already take plenty of breaks during the day, but there's a caveat to this tip. How many breaks are you taking where you're still looking at a screen?

It's so normal for us to classify a work break as a swap from your email screen to social media. But, crucially, you're not giving your eyes a break from the glare of your computer or phone.



Try to take breaks that allow you to fully step away from all computer screens for a short time. Go for a short walk around your office. Head to the coffee break room. Do some light stretches if you work from home.

You can use the Pomodoro technique to add structure to your work-break system.

The Pomodoro Technique:

• Set a timer for 25 mins. This is your first Pomodoro (work) sprint.
• When the timer ends, set a timer for 5 mins for your first break.
• Repeat for 4 cycles.
• At the end of the 4th Pomodoro, take a longer break of 15 mins – 30 mins.

5. Blink!

How many times do you think you've blinked at the last minute? No seriously, take a guess. For context, on average we blink around 20 times per minute during regular activities.

This number dramatically drops when we're staring at a screen for long periods. Scientists believe that this behavior may be related to our eyes trying hard to focus on the thousands of tiny pixels that make up images we see on the screen. It's important to mention that we do the same weird starey behavior when we're reading off of a printed page too. So it could just be the act of reading in general that encourages us to blink less.

The difference is that very few of us read books or newspapers for several hours a day. We can't say the same for computer screens.

Taking breaks without screens will help you to return to your regular blinking rate to avoid dry eyes. You can also try to be more conscious of how much you're blinking.

Of course, this is hard to do. Isn't blinking an unconscious behavior? If your eyes are feeling dry, take a moment to close your eyes and consciously blink more for the next minute. It'll make your poor eyes feel much better.

Preventing computer vision syndrome – when to call a doctor

The tricky thing with Computer Vision Syndrome is that it has very similar symptoms to more serious ailments. While most sufferers only encounter mild symptoms, extended headaches and discomfort can lead to more serious issues.

If you implement the tips and tricks above and still find that you're experiencing cluster headaches and dry eyes, you should consult your physician or an optometrist for advice.

Blurred vision, dizziness, and headaches are also signs that you may need glasses. It's best to investigate if you're experiencing these symptoms for several weeks.

Have you ever felt like your eyelids have been itching the entire day? You might think this is a normal phenomenon, but in reality, you might be suffering from eyelid dermatitis.

Eyelid dermatitis is pretty typical for any age. However, it has its unique health risks, especially during certain seasons of the year. Let's talk more about this eye condition as you scroll below.

What is eyelid dermatitis, and why does it happen?

Many adults will experience eyelid dermatitis at some point in their lives. Source: Verywell Health

Eyelid dermatitis is a type of contact dermatitis, and it's a common skin condition. About 15-20% of people worldwide will probably experience it at some point.[1]

Some people also call this condition eyelid eczema, periocular dermatitis, or periorbital dermatitis.

When it occurs, the symptoms develop on the skin folds above and below your eye. Fortunately, this skin condition is easy to avoid when you know your triggers, such as:

• AllergensAllergens include various things like pollen, animal dander, and certain foods. Get an allergen test from your doctor to identify what might trigger your allergies.
• IrritantsHarsh chemicals in cosmetics, soaps, and detergents can cause eyelid dermatitis. So, don't forget to check the labels before you put anything around or on your eyelid.
• GeneticsWhile it's not a hereditary condition, some people are likelier to get eyelid dermatitis than others. You might be at higher risk if you have a history of asthma and hay fever.
• Skin conditionsA weak skin barrier can be more prone to irritation. If you have sensitive skin or you've experienced other skin conditions like atopic eczema, that puts you at high risk of eyelid dermatitis.
• Extreme weatherSometimes, what happens to your skin might be out of your control. Something like extremely cold or hot weather can trigger eyelid dermatitis. It might also occur if the air is too dry or too humid.

How to tell if I have eyelid dermatitis?

The common symptoms of eyelid dermatitis are easy to spot and include:

• Redness
• Swelling
• Itching
• Burning or stinging sensation
• Scaly skin
• Blistering
• Pain around the eye

You also need to consider that people can experience this skin condition differently. Here are the different types of eyelid dermatitis and how you can identify them.

• Contact dermatitisThis happens when your skin comes in contact with an allergen or irritant. Contact dermatitis is also the most common type. In one study, around half of diagnosed cases of eyelid dermatitis are all because of allergic contact.[2]
• Atopic dermatitisThis is a chronic condition that's linked to allergic reactions. You'd know if you have atopic dermatitis if it causes dry, itchy eyes and skin.
• Seborrheic dermatitisThis type of dermatitis creates red, scaly patches on your skin. For some, this condition creates stubborn dandruff. It can also affect your scalp, face, chest, and eyelids.

Getting proper treatment for eyelid dermatitis

Maintaining eyelid hygiene is an essential step in treating this condition.

If you think you have eyelid dermatitis, the best course of action is to call your doctor immediately. Afterward, you can get immediate relief from the pain with these options;

Topical corticosteroids

Topical corticosteroids, like steroid-based creams and ointments, can soothe the swelling and dryness of your eyelid. However, you should be cautious about using these.

Be careful about this option, though. Excessive usage of corticosteroids can make them less effective over time. It might also induce side effects like acne, hair growth on the applied area, and skin thinning.

If a cream or ointment like this is applied closely to the eye for a long time, it might increase the risk of glaucoma. So, make sure to consult a doctor first before using a topical corticosteroid.

Antihistamines

Oral medication like antihistamines can work if you're not a big fan of topical creams. Universally known as the cure for allergy flare-ups, an antihistamine can ease the inflammation and itchiness of your eyelid.

Moisturizers

Aside from taking meds, a good moisturizing cream can relieve sore and irritated skin. That's especially true if the cream includes soothing ingredients like aloe vera. Plus, you don't need a prescription to buy one.

Moisturizing creams can be a great fighting agent against mild eyelid dermatitis. Just ensure it's gentle, fragrance-free, and made for sensitive skin. As mentioned earlier, aloe vera is a natural option that's safe to use on your eyelids.

Avoidance of skin triggers

Knowing what triggers your skin and allergies can go a long way. Does your eyelid skin react to pollen? Or does it get irritated by something else?

Avoid skin triggers as much as you can with these tips.

• Make dietary changes when necessary.
• Avoid makeup and skincare products that might irritate your eye.
• Check if your soap has harsh chemicals, and don't expose your skin for to long.
• Wear protective eye gear during allergy season, such as a sturdy pair of glasses.

Eyelid hygiene

Like any other body part, you must keep your eyelids clean and healthy. They are the protective layer between your eyes and the environment, keeping your vision safe.

Maintaining eyelid hygiene can be as simple as these steps:

• Remove all eye makeup with a gentle cleanser and a damp cloth.
• Be gentle in cleaning your eyelids. Don't tug or rub the skin too hard.
• Don't forget to rinse the cosmetics or debris away from your eyes with warm water.
• Make sure that your hands are clean every time you touch your eyelids.

Can anything go wrong in treating my eyelid dermatitis?

Untreated eyelid dermatitis can lead to chronic itching and more complications.

While eyelid dermatitis is temporary and might not be a big deal for most people, it can still lead to some health risks. These risks tend to increase the longer you leave conditions ignored or try the wrong treatments.

Untreated eyelid dermatitis can lead to:

• InfectionScratching or rubbing the infected eyelid can create open sores for infection.
• ScarringAn inflamed, open sore left untreated for too long can have permanent consequences. For one, it can scar your eyelid.
• Chronic inflammationIf it happens once, it can happen again. Untreated eyelid dermatitis can leave your skin sensitive and more prone to inflammation.

Be cautious about itchy eyelids

While it's normal to rub the itch away from your eyes occasionally, it becomes an entirely different story if the eyelid itch persists. That might count as a symptom of eyelid dermatitis.

Leaving eyelid dermatitis untreated can lead to more significant risks like infection and scarring. At the very least, consult an eye doctor immediately for help. If you enjoyed content like this, check out Door2USA Prescription Glasses' blog for more info about eye care and health!

References

• 'Eyelid Dermatitis', Cleveland Clinic.
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Myopia, also commonly known as nearsightedness, is a vision condition when you can see objects near to you clearly but those that are far away are blurry. As you read on, you'll learn more about what myopia is, what causes it, as well as how to treat it.

What is nearsightedness (Myopia)?

Nearsightedness (myopia) is a refractive error. That's when the light that enters your eye does not focus directly on your retina, resulting in abnormal vision.

More specifically – myopia occurs when the image of a distant object is focused in front of your retina, causing it to look blurry. This can occur because the refractive power of the eye is too strong, or the eyeball axis is too long.

Here's a quick clip from the American Academy of Ophthalmology to explain:


Myopia is a fairly common vision issue across the globe. In fact, studies show that 41.6% of Americans are nearsighted. What's worse is that by the year 2050, it is predicted that 50% of the global population will be nearsighted.

Aside from myopia, other common refractive errors include:

• Hyperopia (farsightedness)
• Presbyopia
• Astigmatism

Causes and risk factors of nearsightedness

Spending extended time on screens can be a risk factor for nearsightedness.

With such a high prevalence of myopia (nearsightedness), it makes you wonder – "What causes it?"

The truth is, there are a variety of causes and risk factors that affect myopia. These risks are why there has been an increase in myopic people over the years.

Myopia can be caused by genetics. If one or both of your parents are nearsighted, then you're more likely to develop myopia. Research has found approximately 40 genes that are linked to nearsightedness.

Another major risk factor for myopia is spending too little time outside. Studies have shown that more time spent playing outdoors reduces your chances of becoming nearsighted. In addition to this, it also slows the progress of your existing nearsightedness. It is suggested that this is due to the levels of light outside.

Lastly, spending a lot of time with your eyes focused on nearby objects can lead to myopia. This happens when you spend too much time reading or using your tablets, phones, or computers.

If you do a lot of close work, you may experience what is known as pseudomyopia.

This is when your distance vision is blurred because you've spent excessive time focusing on something. Due to this, it is difficult for your eyes to focus on objects in the distance. Typically, your vision is returned to normal after resting your eyes.

How can you know if you're nearsighted?

What are the telling signs of nearsightedness?

While Myopia is usually diagnosed in childhood, there are cases of adult-onset myopia due to diabetes or visual stress. Studies have shown that approximately 10 – 50% of myopia develops in adulthood.

There are several symptoms of myopia. One of the most common symptoms is squinting. If you notice you're squinting to see something clearly in the distance, such as a road sign, the aisle signs in the supermarket, or a friend calling out to you from a distance, then you might be nearsighted.

Besides squinting, constantly holding your books, phone, or other objects close to your face just so you can see them is another sign of myopia. Children with myopia also often sit very close to the TV to see it.

Many people with untreated myopia also typically have frequent headaches due to straining their eyes to see clearly.

If you notice any of these symptoms in yourself, or a loved one, schedule an eye exam as soon as possible.

What do nearsighted glasses do?

Glasses are commonly used to correct myopia.

One of the most common treatments for myopia is the use of glasses. These glasses have prescription lenses that correct your vision and allow you to see clearly. How it works is that the lens bends the light that's entering your eye so that it focuses properly and hits your retina. This turns a blurry image into a clear one.

A common type of lens used in nearsighted glasses is the concave lens. These lenses are thinnest at the center while being thicker at their edges. Another name for concave lenses is minus lenses/minus power lenses because they decrease the eye's focusing power.

By doing this, the minus lenses shift the focus of the light in a myopic eye from in front of the retina backward, so it falls directly on the retina. The result – clear vision.

For a visual explanation, here's a quick clip explaining how concave lenses work to correct your vision:


A type of prescription lens many people use in their glasses is photochromic/transition lenses. These lenses turn dark when you're outside, in reaction to UV rays, and turn back clear when you're inside. They also help to protect your eyes from harmful UV rays too.

Talk to your doctor about transition lenses to see if they're right for you.

There are also variations in the lenses used for nearsighted people. Single vision (monofocal) lenses are the most common type of lens that people wear to correct their field of vision. This is because the entire lens has the same prescription.

However, some people are both near and farsighted (presbyopia). These people need multifocal lenses, which offer varying prescriptions to correct their vision as necessary. There are several types of multifocal lenses:

• Bifocals
• Trifocals
• Progressive

Other ways myopia may be treated

Besides glasses, there are several other ways to treat myopia. Contact lenses are another common treatment for myopia. Many people alternate between their glasses and contact lenses, depending on the occasion.

Contact lenses offer more versatility than glasses, however, they also have their drawbacks. Check out our article on contacts vs glasses for more details.

Besides contact lenses, another form of treatment for Myopia is refractive surgery, also known as laser eye surgery. Laser eye surgery is when your eye surgeon uses a laser beam to fix your cornea, which results in improved vision.

There are three types of refractive surgery:

• Laser in situ keratomileusis (LASIK)your eye surgeon creates a thin, hinged flap into your cornea. Afterward, they use a laser to remove the inner layers of your cornea. Recovery time from LASIK surgery is quicker and more comfortable than PRK.
• Laser epithelial keratomileusis (LASEK) This is when your surgeon makes an ultra-thin flap only in your cornea's outer protective cover (epithelium). Next, they use the laser to correct your cornea's outer layers and replace its epithelium.
• Photorefractive keratectomy (PRK)this is when your eye's epithelium is completely removed. Afterward, a laser is used to remove the tissue and reshape your cornea. The epithelium, which grows back naturally, then grows to fit your eye's new shape. This surgery is deemed the safest among the three.

Another treatment for myopia is increased time outside, especially during your childhood, adolescence, and early adult years. This is because increased time outside may slow down the progression of myopia.

Other possible treatments also include:

• Orthokeratology
• Use of atropine
• Dual focus contact lenses

Wrap up: understanding nearsightedness

As you can see, myopia is a serious issue, and a growing one at that. With 50% of the world's population expected to be myopic to some degree by 2050, it's important that you do as much as you can care for your eyes and those of your children.

Myopia affects us all, young and old, so if you haven't already, schedule an appointment with an eye care professional to see what you can do to protect your vision.

While most people are familiar with 20/20, or even 20/30 vision, there's another type of vision worth understanding: peripheral vision.

Peripheral vision is the part of your sight that allows you to see things out of the corner of your eye. Unfortunately, it can start to decline with age – and if left unchecked, it can lead to some serious problems down the road.

What is the peripheral vision?

When you look at an object, your eyes send signals to your brain to create an image. This image is created by the light that reflects off of the object and into your eye.

The area in the center of this image that you see is called central vision, while the area surrounding the central vision is called peripheral vision.

Peripheral vision is an essential part of your sight that allows you to see objects that are not in your direct line of sight. It might not be as sharp as your central vision, but it's crucial for everyday tasks like driving, walking down the stairs, and even knowing when somebody is coming behind you.

So, what is peripheral vision loss?

Imagine this: out of nowhere, your vision starts to narrow. Darkness begins creeping in from the left, right, top, and bottom, and as you panic, the speed at which your vision narrows increases. In a matter of minutes, all you can see is a small tunnel of light in the center of your vision. Talk about horrifying!

Also known as tunnel vision, peripheral vision loss is a decrease in your ability to see objects that are off to the side. To give you an idea of how our brain uses peripheral vision, let's take a closer look at how we process images.

There are two types of cells in the retina: cones and rods. Cones are mainly in the center of the retina, which is responsible for central vision and color perception. The rest is covered with rods and they are responsible for peripheral vision and night vision, allowing us to see in low light but providing only little detail.

As we age, the number of rods in our retina decreases while the number of cones stays relatively constant, which leads to a decline or loss of peripheral vision. This is a normal part of aging and is not usually a cause for concern.

However, if you're experiencing a drastic decline or sudden loss in your peripheral vision, it could be a sign of a more serious underlying condition affecting the function of your rods.

Some symptoms of peripheral vision loss that you should watch out for include:

• Bumping into objects
• Frequent falls
• Having difficulty reading or driving
• Having difficulty seeing at night
• Seeing dark or blur on the outer edges
• Losing your balance or feeling dizzy

When it comes to eye health, best not to ignore these signals.

When you start experiencing these symptoms, you should see an ophthalmologist as soon as possible to get a proper diagnosis and treatment.

Why can you lose peripheral vision?

Losing peripheral vision is one of the biggest concerns for older people, but it can also affect those of us who are younger.

While it's a normal part of aging, several other causes can lead to peripheral vision loss, such as:

• CataractsA leading cause of vision loss, a cataract is the clouding of the eye's natural lens. As cataracts develop, they can cause blurriness, glare, and sensitivity to light.
• Diabetic retinopathyWhen diabetes is not well-controlled, it can damage the blood vessels in the retina, leading to diabetic retinopathy.
• GlaucomaAn eye condition that damages the optic nerve, which carries information from your eyes to your brain. It is the leading cause of blindness for people over 60 years old.
• Hallucinogenic drugsMost Hallucinogenic drugs, such as LSD and ecstasy, can affect your vision, leading to temporary or permanent tunnel vision.
• MigraineAbout 30% of people with migraines experience visual symptoms called an aura, which can include tunnel vision.
• Optic neuritisThe swelling of the optic nerve, causes blurry or dim vision, dull and faded color perception, and pain in the back of your eye socket.
• Retinal detachmentThe retina is a thin layer of tissue at the back of the eye that's responsible for sending images to the brain. If this tissue detaches from the back of the eye, it can cause blurry vision and see specks and lines.
• Retinitis pigmentosaIf you have retinitis pigmentosa, the way your retina responds to light is altered, making it difficult to see.
• StrokeA stroke can damage the part of the brain that's responsible for processing visual information and cause tunnel vision in one or both eyes.

Is peripheral vision loss permanent?

In some cases, tunnel vision or peripheral vision loss is temporary. For example, if you're suffering from migraines, taking medications can help lessen the frequency and intensity of your headaches and visual symptoms.

Depending on the extent, people who have diabetic retinopathy can also improve their vision by keeping their blood sugar levels under control to prevent further damage to their blood vessels.

If the underlying cause of the peripheral vision loss is stroke, the vision loss might be permanent; however, a recent study at the University of Rochester shows that people who have suffered from complete vision loss due to stroke can regain some of their vision with the help of therapy.

Unlike retinitis pigmentosa, most causes of tunnel vision, such as cataracts, glaucoma, and retinal detachment, may be initially treated with medicine, laser treatment, glasses, or contacts, or can be reversed and cured with different types of surgery.

What to do if you think you have peripheral vision loss

If you think you might be losing your peripheral vision, it's important to see an ophthalmologist or other eye specialist right away. They will be able to give you a comprehensive eye exam to determine the underlying cause of your vision loss and come up with a treatment plan.

One of the common tests used is the dilated eye exam. In this test, drops are placed in your eyes to widen or dilate the pupils. This allows the doctor to get a better look at the back of your eye and check for any signs of damage or disease, such as glaucoma and retinal detachment.

Other tests that your ophthalmologist might perform include:

• Visual field testThis test measures your entire scope of vision, both central and peripheral.
• Optical coherence tomography (OCT) scanOCT is a type of imaging test that produces cross-sectional pictures of your retina to help detect early signs of diabetic retinopathy and glaucoma.
• Fluorescein angiography (FA)FA involves injecting dye into a vein in your arm to see the blood flow in your eye through a special camera and help identify any blockages or leaks in the blood vessels.
• Eye and orbit ultrasoundThis test uses high-frequency sound waves to create images of the inside of your eye to help detect any abnormalities in the structure of your eye, such as a retinal detachment or tumors.
• TonometryThis test measures the pressure inside your eye to screen for signs of glaucoma (high eye pressure).

How to prevent peripheral vision loss

While not all cases of peripheral vision loss can be prevented, there are some measures you can take to lower your risk, protect your vision, and prevent progression.

• Wear sunglasses or protective lenses when outdoors to protect your eyes from harmful UV rays.
• Consume a healthy diet rich in fruits, vegetables, fiber, and other complex carbohydrates.
• Maintain a healthy weight by exercising regularly and drinking plenty of water.
• Quit smoking and excessive drug and alcohol use.
• Get regular eye exams, especially if you have a family history of eye diseases, so any problems can be detected and treated early on.

Better safe than sorry – take your eye exam regularly!

Precautions like these aren't guaranteed to prevent tunnel vision, but they'll certainly lower your risk.

Can tunnel vision be treated?

Most cases of tunnel vision are temporary, but some are permanent. However, there are available treatments such as wearing glasses and contacts, medicine, therapy, and surgery, that can help improve your quality of life and regain some vision.

It's essential to see an ophthalmologist as soon as you experience any changes in your vision so that they can determine the best course of treatment. With early detection and treatment, you can prevent further vision loss and maintain clear sight for years to come.

If you have any concerns about your vision, don't hesitate to make an appointment with an ophthalmologist or other qualified eye care professional.