Blindness and visual impairment in an American urban population.
Snydacker
D
D
D015142:Baltimore; D001766:Blindness / Q000453:epidemiology*; D006297:Health Services Accessibility / Q000191:economics; D006801:Humans; D014481:United States; D014505:Urban Population; D014786:Vision Disorders / Q000453:epidemiology*