Eye Degradation From Ultraviolet Rays
Posted on 05 November 2016
- UVA - The UVA spectrum is 400-315 nm. The lowest energy type of UV rays that damages the cornea and retina in the eyes. UVA rays may cause cataracts and macular degeneration. Macular degradation is a horrible eye disease. It is the leading cause of losing eyesight that affects over 10 million Americans.
- UVB - The UVB spectrum is around 315-280 nm. Your cornea and lenses absorb UVB rays the most.
- UVC - The UVC spectrum is 280-100 nm at the shortest wavelength.
The eyes are mostly exposed to UVA and some UVB rays.
Reflection and Scattering
Direct sunlight is the main source of ocular damage. However, even clouds may cause eye damage by 50% due to the reflection and scattering from the sun. On a cloudy or foggy day, scattering of UV rays increases. Did you know, the ground also reflects UV rays? Grass gives off the lowest reflection at 2%-5%, reflection of water is around 3%–13%, concrete is about 10%, and snow is extraordinarily rated at around 94%. Although winter is coming, it is important to still wear sunglasses. Even though it is not sunny, your eyes are still exposed to UVA and UVB radiation.
Why is Eye Protection Important?
Imagine living your life blind or atleast nearly blind. You would not be able to see the beauty of nature or your friend's and family's faces again. Eye degradation is not something you could easily get back. Sure, you could undergo LASIK surgery or other types of surgery to improve eyesight. However, it is easily prevented by just wearing polarized sunglasses with UV protected lenses. Unless future tech companies developed Deus Ex biopic eyes, it is impossible to transplant your whole eyes with someone else's eyes. Today, it is only possible to just transplant the cornea. Sunglasses are not just for fashion, it helps protect your fragile eyes.