title: Short-term adaptation to the induced effect.
abstract: The short-term adaptation (1-4 h) to the induced effect was investigated on four subjects. A 4% meridional afocal magnifier axis 180 was worn before one eye in normal binocular conditions, which produced vertical retinal-image disparity. In certain circumstances this vertical disparity will give rise to the induced effect, i.e. a surface in the objective frontal plane will appear to be rotated around a vertical axis with the apparently closer edge on the same side as the magnifying lens. Adaptation, which is considered as a reduction in the induced effect over time, was measured with a modified Howard - Dolman apparatus. Both the maximal induced effect and the maximal short-term adaptation occurred within the first 30 min and ranged from 40 to 85%. The final level of short-term adaptation to the induced effect ranged from 20 to 45%. These results suggest a rapid recalibration of binocular depth perception by higher-level perceptual centers.
mesh_terms: D000221:Adaptation, Ocular; D003867:Depth Perception / Q000502:physiology*; D006801:Humans; D009907:Optometry; D013997:Time Factors