IngentaConnect Vision with one eye: a review of visual function following unilat...

Authors: Steeves, Jennifer K.E.¹; González, Esther G.; Steinbach, Martin J.²

Source: Spatial Vision, Volume 21, Number 6, 2008 , pp. 509-529(21)

Abstract:

What happens to vision in the remaining eye following the loss of vision in the fellow eye? Does the one-eyed individual have supernormal visual ability with the remaining eye in order to adapt and compensate for the loss of binocularity and the binocular depth cue, stereopsis? There are subtle changes in visual function following the complete loss of one eye from unilateral enucleation. Losing binocularity early in life results in a dissociation in form perception and motion processing: some aspects of visual spatial ability are enhanced, whereas motion processing and oculomotor behaviour appear to be adversely affected suggesting they are intrinsically linked to the presence of binocularity in early life. These differential effects may be due to a number of factors, including plasticity through recruitment of resources to the remaining eye; the absence of binocular inhibitory interactions; and/or years of monocular practice after enucleation. Finally, despite this dissociation of spatial vision and motion processing, research that has examined visual direction and performance on monocular tasks shows adaptive effects as a result of the loss of one eye. Practically speaking, one-eyed individuals maintain perfectly normal lives and are not limited by their lack of binocularity.

Keywords: ENUCLEATION; MONOCULAR DEPRIVATION; SPATIAL VISION; MOTION PROCESSING; VISUAL DIRECTION

Document Type: Research article

DOI: 10.1163/156856808786451426

Affiliations: 1: Centre for Vision Research, York University, Toronto, Canada; Department of Psychology, York University, Toronto, Canada; Department of Ophthalmology and Vision Sciences, University of Toronto, Canada; The Hospital for Sick Children, Toronto, Can 2: Centre for Vision Research, York University, Toronto, Canada; Department of Psychology, York University, Toronto, Canada; Department of Ophthalmology and Vision Sciences, University of Toronto, Canada; The Hospital for Sick Children, Toronto, Can

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Vision with one eye: a review of visual function following unilateral enucleation