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Show Legal blindness is determined deter-mined by a central visual acuity for distance of 20200 or poorer in the better eye with correction, or a field of vision no greater than 20 degrees de-grees in its widest diameter. An estimated 47,000 one person every 11 minutes become blind each year. The leading causes of blindness, in the order of their frequency, are glaucoma, glauco-ma, macular degeneration, senile cataract, optic nerve atrophy, diabetic retinopathy retino-pathy and retinitis pig-menlosa. pig-menlosa. According to the American Association of Ophthalmology, these causes account for 51 percent per-cent of the nearly 500,000 who are declared legally blind. The Association represents repre-sents more than 5,300 medical med-ical doctors who specialize in diseases of the eye. |