Effect of Artificial Scotomas on Open-Loop Disparity Vergence Eye Movements

Title

Effect of Artificial Scotomas on Open-Loop Disparity Vergence Eye Movements

Creator

Yang D S; Hertle R W; Zhu M X; Tai Z; Hald E; Kauffman M

Publisher

Optometry and Vision Science

Date

2015
2015-01

Description

Purpose. To investigate the effect of an artificial scotoma on open-loop disparity vergence responses (DVRs) and vergence control mechanisms, we examined open-loop DVRs to disparity stimuli using monocular artificial scotomas in normal subjects. Methods. Using a mirror haploscope with two computer monitors, we delivered disparity stimuli on a pair of random dot patterns subtending 40 by 30 degrees at 47 cm from each eye. The scotomas were black circles located in the center of a random dot pattern for the left eye. Eye movements of both eyes were recorded with a magnetic search coil system. Results. We first found that the amplitudes of DVRs were gradually decreased and the latency of DVRs was moderately increased as the size of the scotomas was increased. Second, monocular responses from each eye were symmetrical although the stimuli to each eye were asymmetrical. Conclusions. The results suggest that the monocular eye movements in disparity vergence are controlled by a binocular central mechanism, not driven separately by monocular inputs in the open-loop window.

Subject

binocular disparity; convergence; depth-perception; disparity; dynamic asymmetries; eye movements; fusional; neurons; nystagmus; ocular motor control; Ophthalmology; responses; saccades; single-unit activity; V1; vergence; version

Format

Journal Article

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Rights

Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).

Pages

107-114

Issue

1

Volume

92

Citation

Yang D S; Hertle R W; Zhu M X; Tai Z; Hald E; Kauffman M, “Effect of Artificial Scotomas on Open-Loop Disparity Vergence Eye Movements,” NEOMED Bibliography Database, accessed May 6, 2021, https://neomed.omeka.net/items/show/7634.

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