title: [Survey of heterophoria of 1500 normal male youth].
authors.forename: S M
authors.initials: SM
authors.lastname: Yan
authors.forename: Y P
authors.initials: YP
authors.lastname: Zhang
authors.forename: D C
authors.initials: DC
authors.lastname: Liu
mesh_terms: D000293:Adolescent; D002648:Child; D006801:Humans; D008297:Male; D012016:Reference Values; D014786:Vision Disorders / Q000175:diagnosis / Q000453:epidemiology*; D014787:Vision Tests