Low vision or blindness affects 1 in 28 Americans over the age of 40-- 3.3 million Americans.
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Congdon, Nathan G., Benita J. O'Colmain, Caroline C.W. Klaver, Ronald Klein, Beatriz Munoz, David S. Friedman, John Kempen, Hugh R. Taylor, Paul Mitchell, and Leslie Hyman. "Causes and Prevalence of Visual Impairment Among Adults in the United States". Archives of Ophthalmology. Vol. 122, No. 4, pp. 477-85. [ Permalink ] |