Visual loss is often considered the most feared complicationof human disease, other than death. In 2002, 124 million peopleworldwide had poor vision and 37 million were blind.1 In developedcountries, the primary causes of visual loss are age-relatedmacular degeneration, in the elderly, and diabetic retinopathy,in working-age persons. It is estimated that diabetes mellitusaffects 4 percent of the world's population, almost half ofwhom have some degree of diabetic retinopathy at any given time.Visual loss primarily occurs from either proliferation of newretinal vessels (proliferative diabetic retinopathy) or increasedpermeability of retinal vessels (diabetic macular . . . [Full Text of this Article]
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From the Beetham Eye Institute and Eye Research Section, Joslin Diabetes Center, and the Department of Ophthalmology, Harvard Medical School both in Boston.
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