Amblyopia, not strabismus, identified as key contributor to slow reading in school-age children

Amblyopia, not strabismus, identified as key contributor to slow reading in school-age children
A child is being fitted with the ReadAlyzer eye movement system. Credit: Retina Foundation of the Southwest

Children with amblyopia, commonly known as "lazy eye," may have impaired ocular motor function. This can result in difficulties in activities for which sequential eye movements are important, such as reading. A new study conducted at the Retina Foundation of the Southwest determined that children with amblyopia read more slowly than children with normal vision or with strabismus alone. Their findings are published in the Journal of the American Association for Pediatric Ophthalmology and Strabismus (AAPOS).

"This study marks the first time that , not strabismus, has been identified as the key factor in poorer reading in school-age children with amblyopia," explained lead investigator Krista R. Kelly, PhD, of the Retina Foundation of the Southwest. "Previous studies had not emulated natural reading conditions that the child would normally encounter in school, that is, binocular silent reading of grade-appropriate paragraphs at habitual reading distance. Lastly, these studies had evaluated subjects who had both amblyopia and strabismus and therefore were unable to evaluate the effect of strabismus alone on reading."

Three groups of children were studied: 29 children with amblyopia with or without strabismus, 23 children being treated for strabismus but without amblyopia, and 21 children with normal vision. The children with amblyopia and/or had been referred to the Retina Foundation of the Southwest by 18 pediatric ophthalmologists in the Dallas-Fort Worth area.

The children silently read a grade-level paragraph of text during binocular viewing while fitted with the ReadAlyzer, an eye movement recording system. The researchers measured reading rate, the number of forward and regressive eye movements (saccades) per 100 words, and the length of eye pauses (fixations). Comprehension was evaluated with a 10-item quiz. Only data from children with at least 80% correct responses were included so that it was unlikely that impaired reading in amblyopic children was due to comprehension difficulties.

Amblyopic children read significantly more slowly than strabismic children without amblyopia and normal control children. Statistically, there was not a significant difference in the reading rate between strabismic children without amblyopia and normal control children. Similarly, amblyopic children had about 35% more forward during reading than either strabismic children without amblyopia or normal .


Explore further

Watching movies helped improve vision in children with amblyopia

More information: Krista R. Kelly et al. Amblyopic children read more slowly than controls under natural, binocular reading conditions, Journal of American Association for Pediatric Ophthalmology and Strabismus (2015). DOI: 10.1016/j.jaapos.2015.09.002
Provided by Elsevier
Citation: Amblyopia, not strabismus, identified as key contributor to slow reading in school-age children (2015, November 23) retrieved 9 December 2019 from https://medicalxpress.com/news/2015-11-amblyopia-strabismus-key-contributor-school-age.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
9 shares

Feedback to editors

User comments