Common causes of blindness: a pilot survey in Brooklyn, New York.

The causes of blindness in 105 consecutive legally blind patients were analyzed in a large urban multidisciplinary medical center. It was found that the leading causes of blindness, in order of frequency of incidence, were glaucoma, diabetic retinopathy, senile macular degeneration, and cataract. The periodic collection of statistics on the relative frequency of the causes of blindness is strongly suggested so that possible changes and improvements in health care may be determined.