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Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus v.21 no.6, 2017년, pp.447 - 451.e1   SCIE
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Slow reading in children with anisometropic amblyopia is associated with fixation instability and increased saccades

Kelly, Krista R. (Retina Foundation of the Southwest, Dallas, Texas ) ; Jost, Reed M. (Retina Foundation of the Southwest, Dallas, Texas ) ; De La Cruz, Angie (Retina Foundation of the Southwest, Dallas, Texas ) ; Dao, Lori (ABC Eyes Pediatric Ophthalmology, PA, Dallas, Texas ) ; Beauchamp, Cynthia L. (ABC Eyes Pediatric Ophthalmology, PA, Dallas, Texas ) ; Stager Jr, David (Pediatric Ophthalmology & Adult Strabismus, PA, Plano, Texas ) ; Birch Jr, Eileen E. (Retina Foundation of the Southwest, Dallas, Texas ) ;
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    Background Previous studies show slow reading in strabismic amblyopia. We recently identified amblyopia, not strabismus, as the key factor in slow reading in children. No studies have focused on reading in amblyopic children without strabismus. We examined reading in anisometropic children and evaluated whether slow reading was associated with ocular motor dysfunction in children with amblyopia. Methods Anisometropic children (7-12 years) with or without amblyopia were compared to age-similar normal controls. Children silently read a grade-appropriate paragraph during binocular viewing. Reading rate (words/min), number of forward and regressive saccades (per 100 words) and fixation duration were recorded with the ReadAlyzer. Binocular fixation instability was also evaluated (EyeLink 1000). Results Amblyopic anisometropic children read more slowly (n = 25; mean with standard deviation, 149 ± 42 words/min) than nonamblyopic anisometropic children (n = 15; 196 ± 80 words/min; P = 0.024) and controls (n = 25; 191 ± 65 words/min; P = 0.020). Nonamblyopic anisometropic children read at a comparable rate to controls ( P = 0.81). Slow reading in amblyopic anisometropic children was correlated with increased forward saccades ( r = −0.84, P r = −0.85, P r = −0.52, P = 0.019). Conclusions Slow reading in school-age children with anisometropic amblyopia is related to increased frequency of saccades and fixation instability of the fellow eye. Further research should consider the effects of slower reading on academic performance.


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