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Related Experiment Videos

Monocular eye closure in sunlight.

R E Wiggins1, G K von Noorden

  • 1Cullen Eye Institute, Baylor College of Medicine, Houston, Tex.

Journal of Pediatric Ophthalmology and Strabismus
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

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Patients with intermittent exotropia often close one eye in sunlight due to photophobia, not to avoid double vision. This eye closure is a coping mechanism for light sensitivity.

Area of Science:

  • Ophthalmology
  • Vision Science

Background:

  • Monocular eye closure in sunlight is frequently observed in patients with intermittent exotropia.
  • The underlying reasons and prevalence in diverse populations remain unclear.

Purpose of the Study:

  • To investigate the cause of monocular eye closure in sunlight.
  • To determine if this behavior is linked to intermittent exotropia, other strabismus types, or normal individuals.

Main Methods:

  • Surveyed 147 patients (ages 1-45) with and without strabismus regarding sunlight-induced eye closure.
  • Conducted further testing on cooperative subjects, including exposure to intense light and measurement of photophobia thresholds.

Main Results:

  • Monocular eye closure was most common in intermittent exotropia but also occurred in other strabismus types and normal individuals.

Related Experiment Videos

  • Subjects reported photalgia (light discomfort) and reduced discomfort upon closing one eye.
  • Photophobia thresholds were lower in those who reported eye closure.

    • Conclusions:

    • Monocular eye closure in sunlight serves as a mechanism to alleviate photophobia.
    • This behavior is not associated with avoiding diplopia (double vision).