06 November 2009
Gene Kelly in Blue Blockers | 1986
Unlike UV light, blue light is visible to us. Blue light waves are what makes the sky, or any object, appear blue. Blue light waves are also very short and scatter easily, so a great deal of the glare we experience from sunlight also comes from blue light.
Blue blockers do not act like regular sunglasses. They appear tinted, but they do not reduce overall light or make the world look darker. They alter the appearance of blue and green colors and reduce glare, but they don't affect the way other colors appear. In fact, they may even improve color contrast. Many people with macular degeneration find them particularly helpful regardless of their health benefits, because they reduce glare indoors and outdoors while keeping the world bright and visible.
*In many primate studies, blue light has been shown to cause a photochemical reaction that produces free radicals in the rods and cones of your eye. Researchers believe that these free radicals interact with the high oxygen and lipid content in human rod and cone tips to produce abnormal chunks of metabolized waste that cannot be properly processed, thereby clogging up the macula's maintenance system and producing dry macular degeneration.