Q: What Color Lenses Do I Need?
Neutral gray or "smoke" lenses allow for best color perception. Other good choices are amber and brown tints (which usually block more blue light), or green. Dark lenses may be preferred by those whose eyes are very sensitive to light. Tints such as red, orange, blue or purple are unsuitable because they may interfere with color perception and tend to let in too much light. Since all of the colors we see are made up of visible light, tint is not related to the degree of UV protection provided.
Q: How Do I Know My Lenses are Safe?
Lenses should be inspected for flaws such as scratches, bubbles and distortions. Poorly-made glasses will not damage the structure of your eyes. But flaws and distortion in the lenses may cause your eyes to work harder. That can result in squinting, blinking, tearing and even slight headaches, nausea and dizziness. The Food and Drug Administration requires that all lenses be impact resistant and made of optical-quality glass or plastic. These are valuable with or without a corrective prescription. This does not mean the lenses are shatterproof or unbreakable, but that they can withstand moderate impact.
Glasses for ball sports or sports with physical impact should be made of polycarbonate, which is the most shatter-resistant material widely available today. Polycarbonate is also the best choice for children's sunglasses.
Copyright ©2010 Prevent Blindness America
Last updated September 12, 2011