Eye movement patterns in Iranian dyslexic children compared to non-dyslexic children

Jafarlou, F. and Ahadi, M. and Jarollahi, F. (2021) Eye movement patterns in Iranian dyslexic children compared to non-dyslexic children. Auris Nasus Larynx, 48 (4). pp. 594-600.

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Objective: Dyslexia is the most common learning disorder that affects 5�10 of school aged children. Eye movement abnormalities and visual processing deficits have been reported in some of dyslexic children. Objective of this study is to compare the eye-movement patterns of Iranian dyslexic children with those of non-dyslexic children as they perform the oculomotor tests and to explore the relationship between their eye-movement patterns and their reading ability. Methods: Binocular eye movements were recorded by oculomotor subtype of videonystagmography (VNG) testing on 30 dyslexic children and 20 non-dyslexic age-matched children (aged 8�12) in both genders. Dyslexic children were diagnosed with DSM-V scale by experts in reading disorder centers. Gain of the pursuit and optokinetic tests and the latency, accuracy and velocity of the saccade test were measured in both groups of dyslexic and non-dyslexic children. The independent samples t-test, Chi-square test and linear regression test in SPSS v. 21 were used to analyze behavioral and eye-movement parameters. Results: Compared to the non-dyslexic group, dyslexic children presented lower gain in pursuit and optokinetic tests, and increased latency with decreased accuracy in saccade test. All behavioral and eye-movement parameters without saccade velocity differed significantly among two groups. Conclusion: The atypical eye movement patterns observed in dyslexic children suggests a deficiency in the visual information processing and an immaturity of brain structures responsible for oculomotor skills. © 2020 Elsevier Ltd

Item Type: Article
Additional Information: cited By 0
Subjects: WW Ophthalmology
Depositing User: eprints admin
Date Deposited: 14 Sep 2021 03:48
Last Modified: 14 Sep 2021 03:48
URI: http://eprints.iums.ac.ir/id/eprint/39102

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