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Vision 2018, 2(2), 20; https://doi.org/10.3390/vision2020020

Slant of a Surface Shifts Binocular Visual Direction

1
Faculty of Human Sciences, Kanagawa University, Yokohama-shi, Kanagawa Prefecture 221-8686, Japan
2
Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Koto-ku, Tokyo 135-8533, Japan
*
Author to whom correspondence should be addressed.
Received: 31 January 2018 / Revised: 30 April 2018 / Accepted: 2 May 2018 / Published: 6 May 2018
(This article belongs to the Special Issue Visual Direction)
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Abstract

We demonstrate how the slant of a surface affects the relative visual direction between binocular stimuli. In two experiments, we measured the visual direction of a binocular stimulus at different distances in the mid-sagittal plane or in the transverse plane at eye level relative to the center of the stimulus field. Experiment 1 showed that when a binocular stimulus (a vertical bar) was presented in front of or behind a surface slanted along the vertical center of the surface, its visual direction shifted toward the surface. Experiment 2 showed that when a binocular stimulus (a horizontal bar) was presented in front of or behind a surface slanted along the horizontal center of the surface, its visual direction also shifted toward the surface. These results indicate that the slant of a surface should be listed among the variables that contribute to the binocular visual direction, as well as the retinal loci of the stimulus, binocular eye position, the location of the visual egocenter, and stimulus properties. View Full-Text
Keywords: visual direction; slanted surface; inclined surface; binocular disparity stimuli; depth cue conflict visual direction; slanted surface; inclined surface; binocular disparity stimuli; depth cue conflict
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Kusano, T.; Shimono, K. Slant of a Surface Shifts Binocular Visual Direction. Vision 2018, 2, 20.

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