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Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition

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Published on: July 21, 2020

Shifting eye balance using monocularly directed attention in normal vision.

Sandy P Wong^1,2, Alex S Baldwin^1,3, Robert F Hess^1,4

¹McGill Vision Research, Department of Ophthalmology & Visual Sciences, McGill University, Montreal, Quebec, Canada.

Journal of Vision

|May 5, 2021

Summary

Visual attention can be directed to one eye using unique stimuli, influencing binocular vision. This study shows that monocular attention cues shift eye balance and alter percept switching times, regardless of cue type or attentional load.

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Area of Science:

Neuroscience
Vision Science
Cognitive Psychology

Background:

Attention can be directed to a specific eye, even unconsciously.
Monocular cues can influence perceptual dominance in binocular vision.

Purpose of the Study:

To investigate if eye-based visual cues modulate eye balance in binocular rivalry.
To determine if attentional load differentially affects eye balance.
To assess stimulus specificity of eye balance shifts using color and motion cues.

Main Methods:

Utilized binocular rivalry with continuous percept reporting.
Employed a dual-task versus single-task paradigm to manipulate attentional load.
Presented peripheral, non-overlaid color and motion cues.
Analyzed time series of percept reports aligned to cue onset.

Main Results:

Monocular attention cues significantly shifted eye balance toward the cued eye.
A significant difference in the time to switch percepts was observed.
Eye balance shifts were consistent across both color-based and motion-based cues.
An interaction between cued eye and attentional load influenced eye balance shifts.

Conclusions:

Monocular attention effectively modulates eye balance in binocular vision.
The influence of attention on eye balance is not stimulus-specific for color or motion cues.
Attentional load interacts with monocular attention to affect eye balance shifts.