- block out 99 to 100 percent of both UV-A and UV-B radiation;
- screen out 75 to 90 percent of visible light;
- have lenses that are perfectly matched in color and free of distortion and imperfection; and
- have lenses that are gray for proper color recognition.
If you participate in potentially eye-hazardous outdoor work or sports, your sunglass lenses should be made from polycarbonate or Trivex® material. These lenses provide the most impact resistance.
If you spend a lot of time outdoors in bright sunlight, consider wearing wraparound frames for additional protection from the harmful solar radiation.