Offers excellent color perception. Improves contrast on hazy, cloudy, smoggy or even foggy days. Not recommended for driving since it can cause the wearer to confuse perception of red and green traffic lights. Improves contrast under hazy and moderately sunny conditions. Lenses and Lifestyles Glass or Plastic Sunwear lenses are made of either plastic or glass.
Plastic is thinner, lighter, and more breakage-resistant.
The remainder are made from Polycarbonate, which offers superior breakage resistance, but scratches more easily than CR-39. If you intend to use your sunglasses for sports, consider polycarbonate lenses. They are designed to filter out blue light, protecting against damage to the eye and they increase visual acuity in dominant blue light conditions. Greatly reduce reflected glare and are excellent for driving, sailing, fishing, skiing and any other activity where there is glare off snow, water, or sand. Anti-reflective and UV coatings may be added.