title: Half empty or half full?
authors.forename: M G
authors.initials: MG
authors.lastname: Hattenhauer
authors.forename: D H
authors.initials: DH
authors.lastname: Johnson
authors.forename: D C
authors.initials: DC
authors.lastname: Herman
authors.forename: D O
authors.initials: DO
authors.lastname: Hodge
authors.forename: D T
authors.initials: DT
authors.lastname: Gray
mesh_terms: D001766:Blindness / Q000453:epidemiology* / Q000209:etiology; D005901:Glaucoma / Q000150:complications / Q000453:epidemiology*; D006801:Humans; D008910:Minnesota / Q000453:epidemiology