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  • Title: Sunlight and age-related eye disease.
    Author: Young RW.
    Journal: J Natl Med Assoc; 1992 Apr; 84(4):353-8. PubMed ID: 1507250.
    Abstract:
    Within 50 years, if current trends continue, 50 million elderly Americans will suffer visual impairment from macular degeneration or cataract. However, available evidence indicates that this impending crisis of visual health can be minimized by a simple, safe, inexpensive, and practical means of prevention. Cataract and macular degeneration are the ultimate consequences of normal aging, a lifelong process of deterioration. Three major causes of ocular deterioration have been identified: oxygen, heat, and solar radiation. Among these, the radiation hazard is readily accessible to human intervention. The lens is damaged by ultraviolet radiation in sunlight, whereas the retina can be harmed by high-energy visible radiation (the "violet and blue"). Use of sunglasses that block all ultraviolet radiation and severely attenuate high-energy visible radiation will slow the pace of ocular deterioration and delay the onset of age-related disease, thereby reducing its prevalence. A 20-year delay would practically eliminate these diseases as significant causes of visual impairment in the United States.
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