Infant Visual Acuity as a Function of Viewing Distance

Dynamic retinoscopy has suggested that near vision may be more acute than far vision during early infancy. To test this, acuity thresholds were determined by presenting square wave gratings in a preference paradigm to 1- and 2-month-old human infants at 4 viewing distances. Gratings were paired with...

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Bibliographic Details
Published inChild development Vol. 47; no. 3; pp. 860 - 863
Main Authors Salapatek, Philip, Bechtold, A. Gordon, Bushnell, Emily W.
Format Journal Article
LanguageEnglish
Published United States University of Chicago Press 01.09.1976
University of Chicago Press for the Society for Research in Child Development, etc
Subjects
Accommodation, Ocular
Brief Reports
Child Development
Distance Perception
Eyes
Fixation, Ocular
Humans
Infant
Infant, Newborn
Infants
Myopia
Optical focus
Refraction
Refractive errors
Retinoscopy
Square waves
Stripes
Visual Acuity
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Summary:Dynamic retinoscopy has suggested that near vision may be more acute than far vision during early infancy. To test this, acuity thresholds were determined by presenting square wave gratings in a preference paradigm to 1- and 2-month-old human infants at 4 viewing distances. Gratings were paired with unpatterned fields; direction of first fixation was the dependent measure. Infants exhibited the same acuity at each of the distances at which gratings were presented. The results were interpreted as compatible with the fact that considerable optical defocusing does not seriously affect a visual system, such as the infant's, that is sensitive only to low spatial frequencies.
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ISSN:0009-3920
1467-8624
DOI:10.1111/j.1467-8624.1976.tb02257.x