title: Natural versus haploscopic stereopsis.
abstract: Natural stereopsis is better with a large interpupillary distance (IPD). With haploscopic devices, depth perception is better with a small IPD. This apparently unknown fact has been trigonometrically calculated and experimentally shown by enlarging and diminishing the IPD in 20 subjects.
authors.affiliation: University Eye Clinic, Zürich, Switzerland.
authors.forename: J
authors.initials: J
authors.lastname: Lang
authors.forename: C
authors.initials: C
authors.lastname: Rechichi
authors.forename: J
authors.initials: J
authors.lastname: Stürmer
mesh_terms: D000293:Adolescent; D000328:Adult; D003867:Depth Perception / Q000502:physiology*; D006801:Humans; D014787:Vision Tests / Q000379:methods; D015348:Vision, Binocular