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Using eye tracking to assess reading performance in patients with glaucoma: a within-person study
Nicholas D Smith1, Fiona C Glen1, Vera M Mönter1
1Division of Optometry and Visual Science, School of Health Sciences, City University London, London EC1V 0HB, UK.
Journal of Ophthalmology
|June 3, 2014
Summary
Patients with glaucoma experience longer reading times and more frequent regressions when reading with their worse eye compared to their better eye. This highlights challenges in visual field loss impacting reading performance.
Area of Science:
- Ophthalmology
- Neuroscience
- Vision Science
Background:
- Glaucomatous visual field (VF) loss significantly impacts reading ability.
- Reading speed in glaucoma patients is highly variable and not predicted by standard visual function tests.
Purpose of the Study:
- To investigate reading duration and eye movement patterns in patients with glaucoma.
- To compare reading performance between the worse (more damaged) and better (less damaged) eyes within individuals.
Main Methods:
- Within-person study design comparing reading in the worse vs. better eye.
- Utilized eye tracking to analyze reading duration, saccade rate, regressions, and unknown eye movements (EMs).
- Included 14 glaucoma patients with asymmetric VF loss, measured by mean deviation (MD).
Main Results:
- Reading duration and saccade rate were significantly different between the worse and better eyes (P < 0.001).
- Longer reading duration in the worse eye correlated with a higher proportion of regressions and unknown EMs.
- The difference in reading performance was not directly related to the magnitude of the mean deviation difference between eyes.
Conclusions:
- Glaucoma patients exhibit distinct reading patterns and durations between their affected and less affected eyes.
- Eye tracking provides valuable insights into the functional impact of visual field loss on reading.
- This within-person, between-eye approach is effective for studying reading performance in asymmetric glaucoma.
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