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Portable eye-tracking technology for oculomotor testing: A pre-post exercise and reliability study
Journal article   Open access   Peer reviewed

Portable eye-tracking technology for oculomotor testing: A pre-post exercise and reliability study

Bojana Šarkić, Michelle Le, Marcella.F. Pazzinatto, Matthew G. King, Kay.M. Crossley, Peter Brukner, Alexander Ring, Richard T.R. Johnston, Sarah J. Lampard and Benjamin F. Mentiplay
Sports medicine and health science, In Press
2025
DOI: https://doi.org/10.1016/j.smhs.2025.07.009
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CC BY-NC-ND V4.0,  Open Access

Abstract

Concussion Eye-Tracking Oculomotor Rehabilitation Traumatic Brain Injury Video-oculography
Purpose Mild traumatic brain injury frequently emerges from sport-related incidents, necessitating efficient diagnostic protocols, with oculomotor assessments proposed as a key component due to their ability to detect subtle neural disruptions. As a preliminary step toward leveraging video-oculography in sideline assessments, this study assessed the test-retest reliability of the Neurolign Dx100 Video-Oculography eye-tracking system in healthy adults, alongside investigating any sex and post exercise-induced effects on the assessment results. Methods Thirty-nine healthy adults participated (18 females and 21 males, mean age 32 years). Participants underwent three testing sessions involving oculomotor, reaction time, and cognitive tests where 56 test metrics were examined. Sessions included a baseline assessment, a 24-h, and a 7-day post-assessment for test-retest reliability. A sub-group (n ​= ​30) also completed a standardised exercise bout during their baseline session to examine post exercise effects. Intraclass correlation coefficients examined 24-h and 7-day test-retest reliability, linear models investigated sex differences, and paired t-tests explored exercise effects. Results Results revealed varied 24-h and 7-day test-retest reliability across test metrics. No significant sex differences (p ​> ​0.05) were noted in the majority of test metrics (52 of 56). Significant differences (p ​< ​0.05) in specific oculomotor and reaction time metrics (6 of 56) were observed in pre- and post-exercise comparisons (mostly a reduced performance post-exercise), while the majority of metrics-maintained stability post-exercise. Conclusion The findings from this study provide a resource for decision-making when choosing tests and metrics using the Neurolign Dx 100, facilitating its informed and targeted application in evaluating neuro-oculomotor performance.

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