Though many people wear sunglasses for the “cool factor”, sunglasses serve a very important purpose. They protect eyes from the sun’s harmful rays, and the Minnesota Optometric Association (MOA) advises, don’t leave them home this summer.
Though many people wear sunglasses for the “cool factor”, sunglasses serve a very important purpose. They protect eyes from the sun’s harmful rays, and the Minnesota Optometric Association (MOA) advises, don’t leave them home this summer.
Ultraviolet (UV) glare is especially dangerous during hazy sun conditions because people don’t think they need sunglasses. In fact, there is risk of up to 85 percent of UV rays being reflected upward and that leads to sunburn of the eyes or photokeratitis. In addition, UV rays contribute to the development of cataracts and are thought to be a factor in diseases such as macular degeneration as well.
UV radiation is made up of invisible rays from the sun. The three bands of UV light are: UVA, UVB and UVC. UVB rays are the most worrisome. They burn the skin and cause damage to the eyes. UVA rays are absorbed primarily within the eye’s lens, and research suggests that they are not as harmful as UVB. UVC rays are not a problem because they are absorbed by the upper atmosphere and do not reach the earth's surface.
The MOA recommends the following to protect your eyes from the sun:
The MOA recommends people of all ages wear sunglasses in the winter months, too. Protective eyewear should block out 100 percent of UV radiation, and polarized lenses are especially beneficial because they reduce glare. This is an especially important safety factor in driving, for example. Contact lens wearers should also use sunglasses even if their contact lenses include UV blockers.