Choosing the correct sunglass lens—amber versus yellow, for instance—is the key to protecting your eyes without diminishing vision. "Since a tinted lens decreases the amount of light getting into the eye, the athlete may perceive this as more comfortable, but the lenses may be limiting what they're able to see," says Robert Bailey Jr., an ophthalmology instructor at Thomas Jefferson University, in Philadelphia. Color preference is still subjective, but use this chart as a guide to help pick the right lens for the light conditions and sport. Always choose a shatterproof lens that filters both UVA and UVB rays.

ROSE
Makes details pop when light is flat and enhances scenery against blue backgrounds Best for: urban settings, driving, snow, and watersports

ORANGE
Ups the contrast and shadow definition in medium light conditions Best for: skiing, ball sports

YELLOW
Increases clarity in low-light conditions Best for: cycling, mountain biking, running

GREEN
In overcast conditions, enhances perception of yellows and reds Best for: driving, fishing, golf, whitewater kayaking

TEAL
A highly specialized lens that makes yellow stand out Best for: tennis

BLUE/GRAY
Reduces glare and preserves natural colors Best for: sea kayaking, ocean fishing, surfing

BROWN/AMBER
Increases depth perception and cuts glare on sunny to partly cloudy days; reduces eyestrain caused by haze Best for: all sports

GRAY
Blocks bright sun while allowing you to see colors in their most natural state Best for: running, cycling, hiking, watersports

CLEAR
Provides physical eye protection in low light Best for: 24-hour bike races, night skiing, and adventure racing