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Related Experiment Video

Updated: Oct 10, 2025

A Neuroscientific Approach to the Examination of Concussions in Student-Athletes
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Case Series: Periodic Accommodative Fluctuations after Concussion.

Kevin E Houston, Catherine E McDaniel1, Lynn Greenspan2

  • 1The Ohio State University College of Optometry, Columbus, Ohio.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|December 14, 2021
PubMed
Summary
This summary is machine-generated.

This study identifies a new accommodative disorder linked to concussion, causing fluctuating myopia. Prompt evaluation of refractive stability is crucial for patients experiencing blurry vision post-concussion.

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Vision Science

Background:

  • Concussion can lead to various visual disturbances.
  • Accommodative disorders, affecting the eye's focusing ability, are increasingly recognized post-concussion.

Observation:

  • Two cases presented with accommodative dysfunction following concussion (sports-related and blast injury).
  • Measurements revealed significant, periodic fluctuations in refractive error (myopic shifts) without typical signs of near reflex spasm.
  • Symptoms included headaches and variable blurred vision, impacting visual tasks.

Findings:

  • Case 1 showed rapid refractive fluctuations (-0.25 to -1.75 D) resolving with atropine.
  • Case 2 exhibited slower fluctuations (+0.50 to -2.00 D) unresponsive to vision therapy.
  • This distinct pattern of fluctuating myopia suggests a novel post-concussive visual impairment.

Implications:

  • Highlights the need for assessing accommodative stability in concussion patients with blurry vision.
  • Suggests a potential new diagnostic category for visual dysfunction after head trauma.
  • Informs potential therapeutic strategies for this specific accommodative disorder.