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Related Experiment Video

Updated: Nov 14, 2025

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
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Effect of physiological aging on binocular vision.

Fang-Fang Yan1,2, Hongyu Lv3, Shuhan Fan1,2

  • 1Key Laboratory of Behavioral Science, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.

Psych Journal
|March 9, 2021
PubMed
Summary

Aging does not consistently impair binocular vision functions like stereo vision and binocular combination. However, aging did affect binocular rivalry, specifically alternation frequency.

Keywords:
aging; binocular combination; binocular rivalry; binocular vision; stereopsis

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Gerontology

Background:

  • Binocular vision, crucial for depth perception and object recognition, relies on interocular interaction.
  • While aging is known to affect many visual functions, its impact on binocular vision remains largely uncharacterized.

Purpose of the Study:

  • To investigate the effects of aging on key binocular vision functions.
  • To assess age-related changes in binocular combination, binocular rivalry, and stereo vision.

Main Methods:

  • Evaluated binocular functions in 48 younger and 27 older adults with normal or corrected-to-normal vision.
  • Assessed binocular combination, binocular rivalry (alternation frequency), and stereo vision (Titmus test).
  • Participants had no ophthalmological or mental health conditions.

Main Results:

  • No consistent age-related decline was observed in binocular combination or stereo vision.
  • Aging significantly impacted binocular rivalry, particularly reducing alternation frequency.
  • Aging altered the correlation patterns among different binocular vision functions.

Conclusions:

  • Aging's effects on binocular vision are not uniform across all functions.
  • Specific mechanisms underlying age-related changes in binocular rivalry may differ from those affecting stereo vision and binocular combination.