Vision & Age
The hard fact is, there is more energy in a squash ball than in a .22 caliber bullet. So, for sports that involve a small, rapidly moving ball, get protection for your eyes (regular glasses do not provide the right protection—and may even make injuries worse). And remember, protective eyewear is prone to scratches; be sure to replace them regularly.
Sports goggles with shatterproof plastic lenses and side shields keep out flying objects, dirt, and sand. They are strapped to your head, so you never have to worry about them falling off. Make sure the label says polycarbonate and ASTM F803 and ANSI Z87.1—it's the same plastic used in the windshields of airplanes. Get a lens that is at least 3 mm thick. Look for padding along your brow and the bridge of your nose. And always check the fit carefully.
Be sure to wear sports goggles for:
Swim goggles protect your eyes from bacteria, chlorine, and other nasty chemicals in the water.