Research has shown that long hours in the sun without protecting your eyes increase your chances of developing eye disease. UV-blocking sunglasses can help protect your eyes from sun damage. The ideal sunglasses do not have to be expensive, but they should block 99% to 100% of UVA and UVB radiation. Check the label to be sure they do.
Check the label to be sure they do. Some labels may say, “UV absorption up to 400 nm.” This is the same as 100% UV absorption. Also, labels that say “Meets ANSI UV Requirements” mean the glasses block at least 99% of UV rays. Those labeled “cosmetic” block about 70% of the UV rays. If there is no label, don’t assume the sunglasses provide any protection.
Darker glasses are not necessarily better because UV protection comes from an invisible chemical applied to the lenses, not from the color or darkness of the lenses. Look for an ANSI label.
Large-framed and wraparound sunglasses are more likely to protect your eyes from light coming in from different angles. Children need smaller versions of real, protective adult sunglasses — not toy sunglasses.
Ideally, all types of eyewear, including prescription glasses and contact lenses, should absorb the entire UV spectrum. Some contact lenses are now made to block most UV rays. But because they don’t cover the whole eye and surrounding areas, they are not recommended for eye protection use alone.
(Click on our prevention steps for more information)