1. Not wearing sunglasses
Remember when Anderson Cooper wore that eye patch? He sunburned his eyes while jet skiing in Portugal on a "60 Minutes" assignment, and while he didn't technically lose his sight, he wore it to protect his eye while it healed. If you don't want that to happen to you, always wear a broad-brimmed hat and shades, making sure they protect against ultraviolet rays (look for a special sticker that says, "100 percent UV blocking"). Exposure to UV rays damages the retina and increases your risk of cloudiness on your eye, also known as cataracts. It also makes you more likely to get skin cancer on your eyelids, says Vinay Aakalu, M.D., assistant professor of ophthalmology and ocular facial plastic surgery at the University of Illinois at Chicago.