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Recovering stereo vision by squashing virtual bugs in a virtual reality environment

Vedamurthy, Indu
Knill, David C.
Huang, Samuel J.
Yung, Amanda
Ding, Jian
Kwon, Oh-Sang
Levi, Dennis M.
Published in Philosophical Transactions of the Royal Society. B, Biological Sciences. 2016, vol. 371, no. 1697, p. 20150264
Abstract Stereopsis is the rich impression of three-dimensionality, based on binocular disparity—the differences between the two retinal images of the same world. However, a substantial proportion of the population is stereo-deficient, and reliesmostly onmonocular cues to judge the relative depth or distance of objects in the environment. Here we trained adults who were stereo blind or stereodeficient owing to strabismus and/or amblyopia in a natural visuomotor task—a ‘bug squashing' game—in a virtual reality environment. The subjects' task was to squash a virtual dichoptic bug on a slanted surface, by hitting it with a physical cylinder they held in their hand. The perceived surface slant was determined by monocular texture and stereoscopic cues, with these cues being either consistent or in conflict, allowing us to track the relative weighting ofmonocular versus stereoscopic cues as training in the task progressed. Following training most participants showed greater reliance on stereoscopic cues, reduced suppression and improved stereoacuity. Importantly, the traininginduced changes in relative stereo weights were significant predictors of the improvements in stereoacuity. We conclude that some adults deprived of normal binocular vision and insensitive to the disparity information can, with appropriate experience, recover access to more reliable stereoscopic information. This article is part of the themed issue ‘Vision in our three-dimensional world'.
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Article (Published version) (853 Kb) - public document Free access
Research group Neuroscience cognitive
Project RO1EY020976 from the National Eye
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VEDAMURTHY, Indu et al. Recovering stereo vision by squashing virtual bugs in a virtual reality environment. In: Philosophical Transactions of the Royal Society. B, Biological Sciences, 2016, vol. 371, n° 1697, p. 20150264. doi: 10.1098/rstb.2015.0264 https://archive-ouverte.unige.ch/unige:102033

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Deposited on : 2018-02-09

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