Simulated hyperopic anisometropia and reading, visual information processing, and reading-related eye movement performance in children

Narayanasamy, Sumithira, Vincent, Stephen J., Sampson, Geoff P., & Wood, Joanne M. (2014) Simulated hyperopic anisometropia and reading, visual information processing, and reading-related eye movement performance in children. Investigative Ophthalmology and Visual Science, 55(12), pp. 8015-8023.

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Purpose: This study investigated the impact of simulated hyperopic anisometropia and sustained near work on performance of academic-related measures in children.

Methods: Participants included 16 children (mean age: 11.1 ± 0.8 years) with minimal refractive error. Academic-related outcome measures included a reading test (Neale Analysis of Reading Ability), visual information processing tests (Coding and Symbol Search subtests from the Wechsler Intelligence Scale for Children) and a reading-related eye movement test (Developmental Eye Movement test). Performance was assessed with and without 0.75 D of imposed monocular hyperopic defocus (administered in a randomised order), before and after 20 minutes of sustained near work. Unilateral hyperopic defocus was systematically assigned to either the dominant or non-dominant sighting eye to evaluate the impact of ocular dominance on any performance decrements.

Results: Simulated hyperopic anisometropia and sustained near work both independently reduced performance on all of the outcome measures (p<0.001). A significant interaction was also observed between simulated anisometropia and near work (p<0.05), with the greatest decrement in performance observed during simulated anisometropia in combination with sustained near work. Laterality of the refractive error simulation (ocular dominance) did not significantly influence the outcome measures (p>0.05). A reduction of up to 12% in performance was observed across the range of academic-related measures following sustained near work undertaken during the anisometropic simulation.

Conclusion: Simulated hyperopic anisometropia significantly impaired academic–related performance, particularly in combination with sustained near work. The impact of uncorrected habitual anisometropia on academic-related performance in children requires further investigation.

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ID Code: 78844
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: eye movements, anisometropia, ocular dominance, visual information processing, reading performance
DOI: 10.1167/iovs.14-15347
ISSN: 1552-5783
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Copyright Owner: Copyright 2014 The Association for Research in Vision and Ophthalmology, Inc.
Deposited On: 20 Nov 2014 23:24
Last Modified: 02 Jul 2015 09:31

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