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Motion Sickness, Binocular Visual Functions, and Visual Perception.

Ching-Ying Cheng1,2, Hung-Rui Chen1, Po-Yu Chen1

  • 1Department of Optometry, Chung Shan Medical University, Taichung 402, Taiwan.

Journal of Clinical Medicine
|February 27, 2026
PubMed
Summary
This summary is machine-generated.

Individuals susceptible to motion sickness have poorer visual functions and balance. This study links motion sickness to specific binocular vision issues and reduced postural stability, impacting virtual reality experiences.

Keywords:
binocular visual functionmotion sickness susceptibilityvisual perception

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Human Factors

Background:

  • Motion sickness is a common issue linked to autonomic dysfunction.
  • Modern technology like virtual reality (VR) exacerbates motion sickness.
  • The connection between binocular vision, perception, and motion sickness is understudied.

Purpose of the Study:

  • To investigate the relationship between binocular visual functions and motion sickness.
  • To explore correlations between visual perception and motion sickness susceptibility.
  • To identify visual and balance markers associated with motion sickness.

Main Methods:

  • Adults (20-25 years) were grouped into Sick Tendency (ST) and Normal based on susceptibility.
  • Comprehensive clinical assessments included visual acuity, vergence, accommodation, stereopsis, and contrast sensitivity.
  • Evaluated motor-free visual perception, peripheral awareness, and body balance (center of pressure).

Main Results:

  • The ST group showed significantly higher negative fusional vergence (NFV) and vertical fusional vergence (VFV) at distance, and positive fusional vergence (PFV) at near.
  • Susceptible individuals had poorer near point of accommodation (NPA), stereopsis, and body balance.
  • Deficits suggest a potential accommodation-convergence conflict.

Conclusions:

  • Motion sickness susceptibility is strongly linked to specific binocular vision functions.
  • Poorer postural stability in susceptible individuals may stem from diminished stereopsis and NPA.
  • Further research is needed to understand mechanisms and clinical applications for motion sickness.