UV and Your Eyes: Photokeratitis, Cataracts and Why Sunglasses Aren't Optional
Sun protection isn't just skin-deep; your eyes are vulnerable to UV too, and the long-term toll can include cataracts.
The WHO estimates up to 20% of cataract cases may be caused or worsened by UV exposure, and experts recommend sunglasses that block 99-100% of UV.
The American Academy of Ophthalmology advises choosing sunglasses that block 99 to 100% of UV, noting that cumulative UV exposure contributes to cataracts and other eye damage.
Questions we get a lot
Can UV exposure cause cataracts?
The WHO estimates that up to 20% of cataract cases may be caused or worsened by UV exposure. Cataracts develop over time as cumulative UV damages the eye's lens. Wearing UV-blocking sunglasses consistently is one way to reduce this long-term risk.
What kind of sunglasses protect against UV?
Experts recommend sunglasses that block 99 to 100% of UV rays, often labeled UV400 or '100% UV protection.' The American Academy of Ophthalmology notes that wraparound styles offer added coverage from the sides. A wide-brimmed hat further shields the eyes from overhead sun.
r/optometry: 'Do cheap sunglasses without UV protection actually do more harm than good for my eyes?'