Abstract

When observers dichoptically view bar stimuli at disparities beyond the fusion limit, the bars are perceived as being closer together than they really are. When 6.0-cycle/deg vertical derivative-of-Gaussian bars are adjusted into apparent alignment with binocularly presented spots, the mislocalization of each bar’s half-image is typically 2–5 arcmin for disparities below 60 arcmin. The effect does not generalize to an additional monocular probe bar at more-eccentric locations, thus excluding reflex vergence eye movements as an explanation. Instead, the results indicate a process of interocular matching that seeks to attribute similar directions as well as depths to matching half-images.

© 1988 Optical Society of America

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