Sunglasses can be stylish, but their most important job is protecting your eyes. According to Cleveland Clinic optometrist Chris Erwin, OD, sunglasses can help block harmful ultraviolet, or UV, rays from the sun. These rays can damage your eyes over time and may increase your risk of certain eye problems later in life.*

Not all sunglasses offer the same protection. Some may look dark but still fail to block UV rays. Knowing what to look for can help you choose sunglasses that protect your eyes, reduce glare, and feel comfortable enough to wear every day.

Why UV Protection Matters

Sunlight contains UVA and UVB rays. These are types of ultraviolet radiation that can affect your eyes and the delicate skin around them. You may not feel UV damage happening, but the effects can build up over time.

Long-term UV exposure may increase your risk of eye problems such as cataracts, macular degeneration, retina damage, eye strain, and dry or sensitive eyes. Cataracts can make your vision cloudy. Macular degeneration can affect your central vision, which is the vision you use for reading, driving, and seeing faces. The retina is the light-sensitive part in the back of your eye that helps you see.

UV rays can also damage the skin around your eyes. This may increase your risk of wrinkles, sun damage, and skin cancer in that area.

This is why sunglasses should not be treated as just a summer accessory. Your eyes can be exposed to UV rays whenever you are outside, even on cloudy days.

What to Look for When Buying Sunglasses

The most important feature to look for is full UV protection. Check the label before you buy. Look for sunglasses that say “UV400” or “100% UV protection.” These labels mean the lenses are designed to block harmful UV rays.

You do not need to buy the most expensive pair. What matters most is whether the sunglasses truly block UVA and UVB rays.

Other helpful features include:

Large or wraparound frames. Sunglasses that cover more of your face can help block sunlight from reaching your eyes from the sides.

Polarized lenses. Polarized lenses do not add extra UV protection, but they can reduce glare from water, roads, snow, and other bright surfaces. This can be especially helpful when driving or spending time near water. Polarized lenses may also be helpful if you have had vision correction surgery, such as LASIK.

Trusted brands or retailers. Buying from reliable manufacturers or stores can help ensure the sunglasses have been tested for UV protection.

A comfortable style. The best sunglasses are the ones you will actually wear. Choose a pair that fits well, feels comfortable, and works with your daily routine.

Does Lens Color Matter?

Many people think darker lenses mean better protection, but that is not always true. Lens darkness does not tell you whether the sunglasses block UV rays.

A very dark lens without UV protection can actually be a problem because it may cause your pupils to open wider, allowing more harmful light into your eyes. That is why the UV label matters more than the shade of the lens.

Lens color can still affect how you see. Gray lenses may reduce brightness while keeping colors more natural. Brown or amber lenses may improve contrast. Yellow lenses may also boost contrast in certain conditions. But no matter the color, UV protection should come first.

Should Children Wear Sunglasses?

Yes. Children as young as 6 months old should wear sunglasses when they are outside. UV damage builds up over a lifetime, so starting early can help protect their eyes as they grow.

Just like sunscreen, hats, and water safety, sunglasses can become part of a child’s regular outdoor routine. Look for children’s sunglasses that fit well, offer 100% UV protection or UV400 protection, and are comfortable enough for them to keep on.

What About Prescription Glasses?

Some prescription glasses may offer UV protection, especially if they have certain lens materials or coatings. However, not all regular eyeglasses provide enough sun protection.

If you wear prescription glasses, ask your eye doctor about prescription sunglasses or lenses that darken outdoors. These options may help protect your eyes from UV rays and reduce glare.

The Bottom Line

When choosing sunglasses, focus on protection first. Look for UV400 or 100% UV protection, choose a pair that fits well, and make sure you will actually wear them.

Sunglasses are more than a fashion choice. They are everyday protective gear for your eyes. The right pair can help reduce glare, protect the skin around your eyes, and lower your risk of sun-related eye damage over time. If you are unsure which sunglasses are best for you, ask your eye care provider for guidance.

* Cleveland Clinic (March 25, 2026) “Why UV Protection Matters When You’re Choosing Sunglasses.” health.clevelandclinic.org

The information provided by The Glaucoma Community is for educational purposes only and does not replace professional medical advice. Always talk with your healthcare provider before making changes to your treatment or care. The Glaucoma Community does not endorse specific treatments, providers, or products.