alexa Photosensitivity in mild traumatic brain injury (mTBI): a retrospective analysis.
Ophthalmology

Ophthalmology

Optometry: Open Access

Author(s): Truong JQ, Ciuffreda KJ, Han MH, Suchoff IB, Truong JQ, Ciuffreda KJ, Han MH, Suchoff IB

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Abstract PRIMARY OBJECTIVE: To determine whether photosensitivity (PS) changes over time and, if so, what factors may be related to the change; furthermore, to determine whether tint density changes over time, all in mild traumatic brain injury (mTBI). DESIGN AND METHODS: A retrospective analysis of 62 patient records (aged 18-40 years) with mTBI and PS was conducted. All charts were obtained from the SUNY/College of Optometry clinics from 2004-2011. RESULTS: Fifty per cent demonstrated reduced PS over time, with most occurring after year 1 post-injury (40\%). Promotion of PS reduction appears to be associated with the lack of spectacle tint usage (p = 0.01) and the use of contact lenses (p = 0.03). Inhibition of PS reduction appears to be associated with tinted lenses (p = 0.06), hyperacusis (p = 0.03), dry eye (p = 0.04), migraines (p = 0.03) and loss of consciousness at the time of injury (p = 0.05). Concerning tint density changes over time, 71\% (p = 0.002) maintained the same degree over time, while 27\% (p = 0.002) reduced and 2\% waxed and waned. CONCLUSION: Neural adaptation to PS appears to be a long-term process. Tint usage may act to inhibit this adaptive process, while the use of contact lenses may act to promote it. These findings may provide guidance in the clinical management of photosensitivity in the mTBI population. This article was published in Brain Inj and referenced in Optometry: Open Access

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