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| Clinical Analysis of Visual Function and Reading Learning Dyslexia in Children with Intermittent Exotropia |
| Dehui Zheng, Lifeng Yan, Chuanxu Li, Jin Zhou, Wen Liu, Daoman Xiang, Mengxiang Guo |
| Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou 510623, China |
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Abstract Objective: To determine the differences and correlations of binocular visual function, reading dyslexia and learning disorder between intermittent exotropia (IXT) patients and orthophoric children. Methods: In this prospective clinical study, 39 IXT children (IXT group) and 44 orthophoric children (control group) were sampled by random number method among children who visited the ophthalmology clinic of Guangzhou Women and Children's Medical Center from July 2021 to March 2022. Gender, age, best corrected visual acuity (BCVA), spherical equivalent (SE), horizontal squint, near point of convergence, near stereopsis, amplitude of accommodation, monocular and binocular Flliper test of the two groups were checked and recorded. The participants had completed the Dyslexia Checklist for Chinese Children (DCCC) and The Pupil Rating Scale Revised Screening for Learning Disabilities (PRS). Independent sample t-test, Mann-Whitney U test, Chi-square test, Kruskal-Wallis test, Spearman correlation analysis were used to statistically analyze the data. Results: There were no signifcant difference in gender, age, BCVAand SE between the two groups (P>0.05). There were statistically signifcant differences in horizontal squint, near stereopsis, near point of convergence, and binocular Flliper test between the two groups (P<0.001). There was no signifcant difference in the amplitude of accommodation and the monocular Flliper test between the two groups (P>0.05). There was no difference in all indicators between age groups of IXT group (P>0.05). There were signifcant differences in the incidence of dyslexia and the grade of PRS (χ2=8.45, P=0.004; t=-4.07, P<0.001). The occurrence of the dyslexia was signifcantly correlated with the results of horizontal squint, near stereopsis, near point of convergence, binocular Flipper test and PRS grade (r=-0.43, -0.37, -0.57, 0.41, -0.54, -0.62, respectively, all P<0.05). Conclusions: Compared with orthophoric children, patients with IXT have partial abnormal binocular vision function, and are prone to get reading dyslexia and learning disorder.
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Received: 17 November 2022
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Corresponding Authors:
Mengxiang Guo, Email: gmengxiang@126.com
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