Sunglasses help you in two important ways. They filter light and they protect your eyes from damaging UV rays. Mounting evidence shows that exposure to UV rays can damage your eyes. Long-term exposure to UV rays can lead to cataracts, macular degeneration or skin cancer around the eyelids.
Sunglasses should be worn when you are outdoors so you can protect your eyes.
You should choose sunglasses that:
Be aware that if you are at the beach or on the ski slopes, you should wear sunglasses with a darker tint to block more light. Your risk of eye damage from the sun is greater because of reflection off the water and snow.
Sunglasses makers do not always attach a tag or label stating the amount of UV radiation that sunglasses block. Only buy sunglasses that provide a clear statement about how much UV radiation is blocked.
Read the labels! Always read labels carefully and look for labels that clearly state the sunglasses block 99 to 100% of UV-A and UV-B rays.
Here are some helpful suggestions for choosing sunglasses for children:
Like adults, children should wear brimmed caps and sunglasses that screen out 99 to 100% of UV rays.