ArticleInvestigative ophthalmology & visual science2024
Accommodative and Vergence Responses to a Moving Stimulus in Concussion.
Article in Investigative ophthalmology & visual science, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- A Quantitative Evaluation of the PowerRef 3 for Measuring Gaze Position.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026Article
- Objective assessment of accommodation with an accommodative intraocular lens: Development of methodology and case report.Zeitschrift fur medizinische Physik · 2026Article
- Visual symptom burden after traumatic brain injury: a case-control evaluation of the Arabic BIVSS.Frontiers in neuroscience · 2026Article
- A Study on Optometrists' Knowledge, Awareness, and Management of Traumatic Brain Injury-Related Visual Disorders in Saudi Arabia.Healthcare (Basel, Switzerland) · 2025Article
- Visual Dysfunctions in Mild Traumatic Brain Injury: A Focus on Accommodative System Impairments.Life (Basel, Switzerland) · 2025Review
- The effects of color and neutral density filters on dynamic accommodation in individuals with mild traumatic brain injury.Frontiers in neuroscience · 2025Article
- Optimal Diagnostic Strategies for Concussion-Related Vision Disorders: A Review.Eye and brain · 2025Review
- Cross-cultural adaptation and validation of the brain injury vision symptom survey: bridging the gap with an Arabic version.Frontiers in neurologyArticle
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Authors and funding
16 authors.
Funding
Abstract
Purpose: Concussed adolescents often report visual symptoms, especially for moving targets, but the mechanisms resulting in oculomotor deficits remain unclear. We objectively measured accommodative and vergence responses to a moving target in concussed adolescents and controls. Methods: Thirty-two symptomatic concussed participants (mean age, 14.4 ± 2.6 years; mean days since concussion, 107 days; range, 36-273 days) and 32 healthy controls (mean age, 12.7 ± 2.1 years) viewed a movie binocularly (closed-loop) and monocularly (vergence open-loop), as well as a Difference of Gaussians (DoG) target binocularly (accommodation open-loop). The movie or DoG target sinusoidally moved toward and away from participants at a 0.1-hertz (Hz) frequency at four separate stimulus amplitudes (1.50 diopters [D], 1.00 D, 0.50 D, 0.25 D) around a 2.50-D midpoint. Accommodation and vergence were continuously measured at 50 Hz using the PowerRef 3. Fourier analysis was used to assess the response amplitudes at the 0.1-Hz frequency. A 2 × 3 analysis of variance with the factors group (concussed, control) and viewing condition (binocular, monocular, DoG) was conducted on response amplitudes. Results: Across groups, accommodative and vergence responses were significantly higher in binocular than monocular conditions (P < 0.001), but not DoG conditions. Compared to controls, concussed participants had significantly reduced monocular accommodative responses (P < 0.012; e.g., at 1.50 D, controls = 1.09 ± 0.47 D and concussed = 0.80 ± 0.36 D, P = 0.011). No group differences were observed for vergence responses in any viewing condition. Conclusions: Accommodative and vergence responses to the moving target were largely driven by disparity cues for both groups, with only minimal improvements in the presence of additional blur cues. Concussed participants showed reduced accommodative responses to a 0.1-Hz stimulus in monocular conditions, indicating mild accommodative deficits in the absence of disparity cues.
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