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Related Experiment Video

Updated: May 21, 2026

How to Create and Use Binocular Rivalry
14:34

How to Create and Use Binocular Rivalry

Published on: November 10, 2010

Interactions between surround suppression and interocular suppression in human vision.

Yong-Chun Cai1, Shena Lu, Chao-Yi Li

  • 1Department of Psychology and Behavioral Sciences, Zhejiang University, Hangzhou, China. yccai@zju.edu.cn

Plos One
|June 5, 2012
PubMed
Summary
This summary is machine-generated.

Visual surround suppression and interocular suppression interact significantly. This study reveals strong surround suppression occurs even at the fovea, challenging previous assumptions about visual processing.

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Last Updated: May 21, 2026

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07:45

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

Published on: July 21, 2020

Area of Science:

  • Neuroscience
  • Visual Perception
  • Computational Neuroscience

Background:

  • Visual processing involves suppression phenomena like surround suppression and interocular suppression.
  • Surround suppression typically impairs target detection within a high-contrast surround, historically localized to the visual periphery.
  • Interocular suppression reduces sensitivity to a monocular target via a superimposed mask in the fellow eye.

Purpose of the Study:

  • To investigate the interaction between surround suppression and interocular suppression.
  • To determine if surround suppression occurs at the fovea.
  • To explore how these two suppression mechanisms influence a common foveal target.

Main Methods:

  • A foveal target grating in one eye was interocularly suppressed by a noise pattern in the other eye.
  • The foveal target was presented alone or surrounded by a monocular annular grating with varied orientation and eye-of-origin.
  • Interocular suppression was modulated by a binocular fusion ring, and noise contrast was varied.

Main Results:

  • Adding a surround grating significantly impaired foveal target detection under interocular suppression, indicating strong foveal surround suppression.
  • Releasing interocular suppression dramatically decreased the surround suppression effect.
  • Surround suppression strength depended on dichoptic noise contrast, peaking at intermediate levels.

Conclusions:

  • Surround suppression and interocular suppression are not independent but interact strongly.
  • Strong surround suppression can occur at the fovea, not just the periphery.
  • These findings refine our understanding of visual contextual modulation and binocular vision.