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Infant Vision$
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François Vital-Durand, Janette Atkinson, and Oliver J. Braddick

Print publication date: 1996

Print ISBN-13: 9780198523161

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780198523161.001.0001

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Eye alignment and convergence in young infants

Eye alignment and convergence in young infants

(p.221) 15 Eye alignment and convergence in young infants
Infant Vision

Louise Hainline

Patricia M. Riddell

Oxford University Press

The presence of a fovea, a region with higher spatial resolution than the rest of the retina, coincides in vertebrate evolution with the emergence of several visual characteristics. Migration of the eyes from a lateral position to the front of the head produced significant overlap of the visual fields of the two eyes, allowing the emergence of binocular visual interactions. Sensory fusion and stereopsis allow a finely tuned perception of depth that emerges through the action of disparity detectors, cortical cells that compare the simultaneous inputs from the two eyes. The central topic of this chapter is an aspect of visual/motor development, specifically the development of binocular eye alignment in vergence (change in alignment of the visual axes of the two eyes to look at objects at different distances). Given the recognition of the importance of sensory–motor interactions during early development, it is perhaps surprising to find how little attention has been given to this factor in visual development.

Keywords:   fovea, visual characteristics, binocular visual interactions, sensory fusion, stereopsis, sensory–motor interactions

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