title: Prevalence of disabled stereopsis in a class of optometry students.
abstract: Stereopsis is said to be disabled when the third dimension (3-D) cannot be perceived during everyday life but can be when viewing conditions are appropriately arranged. To discover a test suitable for detecting disabled stereopsis, I measured stereoacuity, stereolatency, and the subjective difference in depth perception between monocular and binocular vision of a group of 41 optometry students. Only 2 students showed no sign of this disability. A predictive value for each test was calculated from the results of 14 students whose disability was confirmed by another means. Stereoacuity had the worst predictive value (43%) and stereolatency the best (100%). The prevalence of disabled stereopsis in this group was no less than 34% and might have been as great as 95%.
authors.affiliation: Ecole d'Optométrie, Université de Montréal, Québec, Canada.
authors.forename: W L
authors.initials: WL
authors.lastname: Larson
mesh_terms: D003867:Depth Perception; D006801:Humans; D009907:Optometry; D010468:Perceptual Disorders / Q000175:diagnosis* / Q000628:therapy; D011237:Predictive Value of Tests; D015995:Prevalence; D012683:Sensory Deprivation; D013336:Students, Health Occupations; D014787:Vision Tests; D015348:Vision, Binocular; D015349:Vision, Monocular; D014792:Visual Acuity