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Related Experiment Video

Updated: Nov 4, 2025

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

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

Published on: July 21, 2020

Vergence eye movements during figure-ground perception.

Maria Solé Puig¹, August Romeo¹, Hans Supèr²

¹Departament de Cognició, Desenvolupament i Psicologia de l'Educació, Faculty of Psychology, University of Barcelona, Barcelona, Spain.

Consciousness and Cognition

|May 22, 2021

Summary

Vergence eye movements help segregate visual information into figures and backgrounds. Eye convergence is stronger when detecting figures, especially low-contrast ones, indicating a role in visual attention.

Keywords:

Attention Convergence Eye tracking Fixational eye movements Human Perception Pupil

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Area of Science:

Neuroscience
Cognitive Psychology
Vision Science

Background:

Figure-ground segregation is crucial for organizing visual input.
Vergence eye movements are primarily associated with depth perception.
Emerging research suggests a link between vergence and visual attention.

Purpose of the Study:

To investigate the psychophysical role of vergence eye movements in figure-ground segregation tasks.
To determine if vergence responses differ during figure versus ground perception.
To examine how vergence relates to the success of figure detection and stimulus contrast.

Main Methods:

Psychophysical experiments were conducted to measure vergence responses.
Participants performed figure-ground segregation and detection tasks.
Eye movements, specifically vergence, were recorded during these tasks.

Main Results:

Subjects exhibited eye convergence during figure-ground detection tasks.
Vergence responses were significantly larger in trials where a figure was present compared to ground-only trials.
Stronger vergence was observed in successfully detected figure trials versus unnoticed figures, and for low-contrast figures over high-contrast ones.

Conclusions:

Vergence eye movements play a discriminative role in figure-ground segregation.
These vergence responses appear to support visual attention mechanisms during object-background differentiation.
The findings suggest a broader function for vergence beyond depth perception, extending to attentional processes in vision.