title: [Contour interaction in the examination of visual acuity].
abstract: The author discusses the problem of the interoptotype distance in visual acuity charts. A small interoptotype distance (5,5' minutes) kept constant throughout the chart enhances the sensitivity of the visual acuity measurement for the detection of a functional deficit, without decreasing its specificity. A specification of the distance between the last recognized optotypes should be given with the visual acuity in order to permit an estimate of the measurement's validity. A simple formula for the measurement in minutes of the angular interoptotype distance is presented.
authors.affiliation: Centro per lo strabismo, Como, Italie.
authors.forename: G P
authors.initials: GP
authors.lastname: Paliaga
mesh_terms: D000293:Adolescent; D002648:Child; D006801:Humans; D008954:Models, Biological; D014787:Vision Tests; D014792:Visual Acuity
vernacular_title: L'interaction de contours dans l'examen de l'acuité visuelle.