title: Practical cataract classification for epidemiological studies.
authors.affiliation: Eye Clinic, Berlin-Buch, FRG.
authors.forename: U R
authors.initials: UR
authors.lastname: Meinel
mesh_terms: D002386:Cataract / Q000145:classification* / Q000453:epidemiology; D004812:Epidemiologic Methods; D006801:Humans