title: Important causes of visual impairment in the world today.
authors.affiliation: Dana Center for Preventive Ophthalmology, Johns Hopkins University Schools of Medicine and Public Health, Baltimore, Md, USA. ncongdon@jhmi.edu
authors.forename: Nathan G
authors.initials: NG
authors.lastname: Congdon
authors.forename: David S
authors.initials: DS
authors.lastname: Friedman
authors.forename: Thomas
authors.initials: T
authors.lastname: Lietman
mesh_terms: D001766:Blindness / Q000453:epidemiology* / Q000209:etiology*; D002386:Cataract; D003930:Diabetic Retinopathy; D015817:Eye Infections; D005131:Eye Injuries; D014943:Global Health; D006801:Humans; D008268:Macular Degeneration; D012030:Refractive Errors; D015354:Vision, Low / Q000453:epidemiology* / Q000209:etiology*; D014802:Vitamin A Deficiency