June 2017
Volume 58, Issue 8
Open Access
ARVO Annual Meeting Abstract  |   June 2017
Sensitivity to binocular disparity is reduced by mild traumatic brain injury.
Author Affiliations & Notes
  • Gunnar Schmidtmann
    Ophthalmology, McGill Vision Research, Montreal, Quebec, Canada
    The Research Institute of the McGill University Health Centre, Traumatic Brain Injury Program, Montreal, Quebec, Canada
  • Alexandre Reynaud
    Ophthalmology, McGill Vision Research, Montreal, Quebec, Canada
  • Daniel P Spiegel
    Ophthalmology, McGill Vision Research, Montreal, Quebec, Canada
  • Tatiana Ruiz
    Ophthalmology, McGill Vision Research, Montreal, Quebec, Canada
    The Research Institute of the McGill University Health Centre, Traumatic Brain Injury Program, Montreal, Quebec, Canada
  • Maude Laguë-Beauvais
    The Research Institute of the McGill University Health Centre, Traumatic Brain Injury Program, Montreal, Quebec, Canada
  • Robert F Hess
    Ophthalmology, McGill Vision Research, Montreal, Quebec, Canada
  • Reza Farivar
    Ophthalmology, McGill Vision Research, Montreal, Quebec, Canada
    The Research Institute of the McGill University Health Centre, Traumatic Brain Injury Program, Montreal, Quebec, Canada
  • Footnotes
    Commercial Relationships   Gunnar Schmidtmann, None; Alexandre Reynaud, None; Daniel Spiegel, None; Tatiana Ruiz, None; Maude Laguë-Beauvais, None; Robert Hess, None; Reza Farivar, None
  • Footnotes
    Support  This research was funded by the Research Institute of the McGill University Health Centre Grant and by the Psychological Health and Traumatic Brain Injury Research Program of the U.S. Department of Defense under award W81XWH-14-1-0320.
Investigative Ophthalmology & Visual Science June 2017, Vol.58, 5421. doi:
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    • Get Citation

      Gunnar Schmidtmann, Alexandre Reynaud, Daniel P Spiegel, Tatiana Ruiz, Maude Laguë-Beauvais, Robert F Hess, Reza Farivar; Sensitivity to binocular disparity is reduced by mild traumatic brain injury.
      . Invest. Ophthalmol. Vis. Sci. 2017;58(8):5421.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : The impairment of visual functions is one of the most common complaints following mild traumatic brain injury (mTBI). TBI-associated visual deficits include blurred vision, reading problems and eye strain. In addition, previous studies have found evidence that TBI can diminish early cortical visual processing, particularly for second-order stimuli. We investigated whether cortical processing of binocular disparity is also affected by mTBI.

Methods : In order to investigate the influence of mTBI on stereopsis, we measured the quick Disparity Sensitivity Function (qDSF) in 22 patients with mTBI. Patients with manifest strabismus and double vision were excluded. Compared to standard clinical tests, the qDSF is unique in that it offers a quick and accurate estimate of thresholds across the whole spatial frequency range (Reynaud, Gao, & Hess, 2015, Vision Research, 113, 97–103).

Results : The resulting qDSF parameters (max gain and peak spatial frequency) in the mTBI patients were significantly reduced compared to the normative dataset (n = 61) introduced by Reynaud et al. (2015). The peak spatial frequency was not affected.

Conclusions : Results show that patients with mTBI may experience significant impairments in global stereopsis. We argue that the reduced disparity sensitivity in patients with mTBI is caused by cortical changes (e.g. axonal shearing, or reduced interhemispheric communication) rather than oculomotor dysfunction. The qDSF method may provide a rapid, valid, and economical tool to extensively characterize disparity sensitivity.

This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.

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