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Updated: Jan 25, 2026
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Controlled Cortical Impact Model for Traumatic Brain Injury
Published on: August 5, 2014
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Observer-perceived light aversion behaviour in photophobic subjects with traumatic brain injury
Phillip T Yuhas1, Patrick D Shorter1,2, Catherine E McDaniel1
1College of Optometry, Ohio State University, Columbus, Ohio, USA.
Clinical & Experimental Optometry
|May 1, 2019
Summary
Masked observers could not differentiate traumatic brain injury (TBI) patients with photophobia from controls using video analysis of eye responses to light. Objective diagnostic tools for TBI-related photophobia are still needed.
Area of Science:
- Ophthalmology
- Neurology
- Trauma Care
Background:
- Photophobia is a frequent and debilitating consequence of traumatic brain injury (TBI).
- Current diagnostic methods for TBI-related photophobia are insufficient.
- This study explored objective video-based assessment of ocular responses to light.
Purpose of the Study:
- To determine if masked observers can distinguish individuals with TBI-associated photophobia from controls using video recordings of their pupillary light responses.
- To evaluate the reliability of observer grading of light aversion behaviors.
Main Methods:
- Recruited cohorts of students, photophobic TBI subjects, and matched controls.
- Utilized a custom pupillometer to deliver controlled red and blue light stimuli.
- Recorded consensual pupil light responses and graded light aversion behaviors (blinking, tearing, squinting) from video recordings.
Main Results:
- TBI subjects reported greater discomfort from light stimuli compared to controls.
- Masked observers showed high agreement in grading light aversion behaviors from videos (ICC=0.78).
- However, observer grades of light aversion behaviors did not significantly differ between TBI and control groups.
Conclusions:
- Video recordings of ocular responses to light are insufficient for diagnosing TBI-related photophobia.
- There is an unmet need for objective diagnostic tests for this common TBI symptom.
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