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Correlation between Eye Movements and Asthenopia: A Prospective Observational Study.

Ziyuan Liu1,2, Kaiyun Zhang1,2,3, Shuang Gao1,2

  • 1Department of Ophthalmology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing 100191, China.

Journal of Clinical Medicine
|December 11, 2022
PubMed
Summary
This summary is machine-generated.

Eye tracking effectively assesses asthenopia (eye strain) by analyzing eye movements. Reduced fixation duration and counts are key indicators of this condition, offering objective measurement possibilities.

Keywords:
accommodationasthenopiaeye movementsvisual fatigue

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Area of Science:

  • Ophthalmology
  • Human-Computer Interaction
  • Visual Science

Background:

  • Asthenopia, commonly known as eye strain, affects a significant portion of the population, particularly those engaging in prolonged screen use.
  • Current assessment methods for asthenopia often rely on subjective questionnaires, necessitating more objective diagnostic tools.

Purpose of the Study:

  • To investigate the correlation between specific eye movement patterns and the severity of asthenopia.
  • To explore the potential of eye-tracking technology as an objective method for diagnosing and assessing asthenopia.

Main Methods:

  • A prospective observational study involving 93 college students experiencing asthenopia.
  • Utilized the Computer Visual Syndrome questionnaire for subjective assessment and eye-tracking to record binocular accommodation and eye movements during a reading task.
  • Analyzed correlations between questionnaire scores, accommodation measures, and eye movement parameters, comparing data from initial and final reading segments.

Main Results:

  • 81.7% of participants exhibited symptoms of computer visual syndrome.
  • Positive correlations were found between asthenopia symptoms (e.g., difficulty focusing, double vision) and specific eye movement parameters like fixation duration, saccades, and reading speed.
  • Prolonged reading (20 minutes) led to significant decreases in parameters such as total fixation duration, fixation count, and reading speed, alongside an increase in unknown saccades.

Conclusions:

  • Eye-tracking presents a viable and objective method for assessing asthenopia.
  • Decreased fixation duration and fixation counts emerge as significant indicators associated with asthenopia, suggesting their utility in clinical evaluation.