ASSESSMENT OF STEREOPSIS IN HUMAN INFANTS

  • 1 January 1980
    • journal article
    • research article
    • Vol. 19  (11) , 1400-1404
Abstract
A new method for testing stereopsis in infants is described for use in the early assessment of binocular function. Infants [4, 6 and 12 mo. old] were presented with a dynamic random-element stereogram generated on a color television monitor. A stereoscopic form was moved laterally, left or right, to elicit the visual attention of the infant. An observer, unaware of the direction of form movement, made a forced-choice judgment of the direction of form displacement based on information gleaned from observations of the infant''s behavior. The observer''s performance for all 3 age groups exceeded chance levels of responding (P < 0.001). Individual infants within each age group provided strong evidence of stereopsis. The applicability of the method for the screening of binocular anomalies is discussed.