UV rays, in form of UVA and UVB, are ultra violet rays from sun which come through the atmosphere to the earth.
They are invisible and are harmful to both our skin and eyes, so it is very dangerous to exposure to UV rays for a long time because we do not even notice the bad resultsThe increased risk of skin cancer induced by UV rays is recognized by lots of people, so people use hat and umbrella to protect their skin. But the damage of UV rays to eyes is not fully emphasized till now. Retina, the nerve rich center of your eyes, is the most significant part used for seeing. Long time exposure to eyes will greatly damage the retina in a nonreversible way, which may cause some chronic eyes diseases, such as cataracts, and the most seriously eyesight loss. Sunglasses may be the most appropriate way to protect eyes in a sunny day. However, when choosing sunglasses, you are suggested to keep the following tips.
- You are certain to choose one pair with good color recognition and undistorted image. No one would like to see the world in a fuzzy way.
- Choose one pair with 100% UV protection, including both the UVA and UVB.
- Choose one pair with 75 to 90 percent of visible light prevention, for some invisible light are also harmful to eyes.
- You should remember not to choose too small lenses, as they are not good for guarding your eyes from UV rays completely. UV rays may slip into your eyes with the help of your smaller sunglasses, thus leading to damage.
We should realize the significance of protecting our eyes from UV rays and we should take effective measurements to avoid any risk of eyes. Sunglasses may be the best choice available now to prevent the harmful UV rays to the eyes. So try to pick up a pair of satisfying sunglasses with both good looking and useful help. More infoPolarization and UV protection of sunglasses Ultraviolet radiation and sunglasses Default Author Bio:Firmoo.com is the fastest growing online community selling affordable yet high quality prescription eyeglasses, prescription sunglasses and other eyewear. Firmoo
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