UV protection is crucial to the well being of one's skin but also eyes. The UV radiation that comes from the sun comes in three different types. UV-A, UV-B and UV-C. UV-C is absorbed by the ozone and therefore isn't harmful. UV-A and UV-B however can be harmful to one's eye. Long term UV exposure can speed up the progression of cataracts. It can also cause changes to the surface of the eye in the form of pinguecula or pterygium. UV is also a risk factor for Age Related Macular Degeneration. Short term exposure of excessive amounts of UV can lead to photokeratitis, or a sun burn of the eye.
To provide adequate protection from the sun your sunglasses should*:
block out 99 to 100 percent of both UV-A and UV-B radiation;
screen out 75 to 90 percent of visible light;
be perfectly matched in color and free of distortion and imperfection; and
have lenses that are gray for proper color recognition
If you spend a lot of time outdoors, wrap around frames can provide additional protection from the harmful solar radiation.
Don’t forget UV protection for kids of all ages. They tend to spend more time outdoors compared to adults.
Always wear UV protected eyewear and keep up with your yearly eye exams. Not all tints work for the same patient. Your doctor will monitor your vision and ocular health and can recommend the best type of sunglasses for you.
*Information gathered from the AOA website.
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