Sunglasses are more than a fashion statement; their most important role is protecting your eyes and the surrounding skin from the sun’s damaging ultraviolet rays. Damage to the eyes includes cataracts, macular degeneration, pterygiums, and cancer. Extended exposure to UV can cause photokeratitis, also known as snowblindness, a temporary but extremely painful sunburn of the eye. Sunglasses also block glare, which increases comfort in bright light. When buying sunglasses, look for ones that block out at least 99% of both UVA and UVB radiation, so you can keep your eyes healthy and your vision clear. A wide-brimmed hat offers great protection, too.