Mislocalization of diplopic images.
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.
Rose
D
D
Cresap Neuroscience Laboratory, Northwestern University, Evanston, Illinois 60208.
Blake
R
R
D003867:Depth Perception / Q000502:physiology; D004172:Diplopia / Q000503:physiopathology; D006801:Humans; D008960:Models, Psychological; D010775:Photic Stimulation; D015348:Vision, Binocular; D014796:Visual Perception / Q000502:physiology