It’s recommended that you always wear protective lenses outdoors – even on overcast days. Sunglasses protect your eyes from harmful ultraviolent (UV) rays, and exposure to these rays has been associated with the development of cataracts and Age-Related Macular Degeneration (ARMD). Quality sunglasses protect your eyes by blocking 100 percent of the sun’s harmful UV rays. Sunglasses also protect the delicate skin around the eyes from UV rays that cause wrinkles and premature aging.