| UV rays, in form of UVA and UVB, are ultra violet | | | | recognition and undistorted image. No one would like to |
| rays from sun which come through the atmosphere to | | | | see the world in a fuzzy way. |
| the earth. They are invisible and are harmful to both | | | | 2. Choose one pair with 100% UV protection, including |
| our skin and eyes, so it is very dangerous to exposure | | | | both the UVA and UVB. |
| to UV rays for a long time because we do not even | | | | 3. Choose one pair with 75 to 90 percent of visible light |
| notice the bad results | | | | prevention, for some invisible light are also harmful to |
| The increased risk of skin cancer induced by UV rays | | | | eyes. |
| is recognized by lots of people, so people use hat and | | | | 4. You should remember not to choose too small |
| umbrella to protect their skin. But the damage of UV | | | | lenses, as they are not good for guarding your eyes |
| rays to eyes is not fully emphasized till now. Retina, the | | | | from UV rays completely. UV rays may slip into your |
| nerve rich center of your eyes, is the most significant | | | | eyes with the help of your smaller sunglasses, thus |
| part used for seeing. Long time exposure to eyes will | | | | leading to damage. |
| greatly damage the retina in a nonreversible way, | | | | We should realize the significance of protecting our |
| which may cause some chronic eyes diseases, such | | | | eyes from UV rays and we should take effective |
| as cataracts, and the most seriously eyesight loss. | | | | measurements to avoid any risk of eyes. Sunglasses |
| Sunglasses may be the most appropriate way to | | | | may be the best choice available now to prevent the |
| protect eyes in a sunny day. However, when choosing | | | | harmful UV rays to the eyes. So try to pick up a pair |
| sunglasses, you are suggested to keep the following | | | | of satisfying sunglasses with both good looking and |
| tips. | | | | useful help. |
| 1. You are certain to choose one pair with good color | | | | |