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Interocular transfer of the movement aftereffect in central and peripheral vision of people with strabismus

By Robert P O\u27Shea, A A McDonald, A Cumming, D Peart, G Sanderson and A CB Molteno


Purpose. To compare binocularity in central and peripheral vision of people with early-onset strabismus and people with normal binocular vision. Methods. Ten subjects with early-onset strabismus, and nine subjects with normal binocular vision were tested. To assess binocularity, interocular transfer (IOT) of a rotary movement aftereffect (MAE) was measured. The MAE stimuli were either confined to the central 2.8 degrees of the visual field or were presented 10 degrees into peripheral vision. Results. In peripheral vision, there was no significant difference in IOT for the two groups of subjects. In central vision, there was a significant decrease of IOT in subjects with early-onset strabismus. Their IOT was, however, significantly greater than zero. Conclusions. Early-onset strabismus appears to spare binocularity in peripheral vision but reduces it in central vision. It does not abolish binocularity assessed by IOT of MAE, suggesting that some binocular connections survive early-onset strabismus, even in central vision

Topics: Medicine and Health Sciences
Publisher: ePublications@SCU
Year: 1994
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Provided by: ePublications@SCU
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