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Cataract is a self-defence reaction to protect the retina from oxidative damage | February 2011
Cataract is an age related disease. The lens becomes progressivelyopaque and more yellow, causing an increase in lightabsorption in the 300–500 nm range, thus diminishing our perceptionof violet and blue light [1–3]. An estimated 20.5 million (17%)Americans older than 40 years have cataract in either eye and 6.1million (5%) have had cataracts extracted..