Visual Disability, Visual Function, and Myopia among Rural Chinese Secondary School Children: The Xichang Pediatric Refractive Error Study (X-PRES)‚ - Report 1

  • The purpose of this study was to evaluate visual acuity, visual function, and prevalence of refractive error among Chinese secondary-school children.

  • This was a cross-sectional school-based study conducted on 1892 rural secondary school students in Xichang, China.

  • The number of children with uncorrected, presenting, and corrected visual disability (6/12 in the better eye) was 41.2%, 19.3%, and 0.5%, respectively.

  • Myopia < −0.5, < −2.0, and < −6.0 D in both eyes was present in 62.3%, 31.1%, and 1.9% of the subjects, respectively.

  • Among the children with visual disability when tested without correction, 98.7% was due to refractive error, while only 53.8% (414/770) of these children had appropriate correction.

  • The girls had significantly (P < 0.001) more presenting visual disability and myopia < −2.0 D than did the boys.

  • More myopic refractive error was associated with worse self-reported visual function (ANOVA trend test, P < 0.001).

  • The visual disability in Chinese children was common and it is crucial conduct relevant studies in order to early vision correction.

This article was identified as a reference for a VII-commissioned systematic review on the Impact of URE on Children.

Publication date

December 7, 2016


Investigative Ophthalmology & Visual Science


Congdon, N., Wang, Y., Song, Y., Choi, K., Zhang, M., Zhou, Z., Xie, Z., Li, L., Liu, X., Sharma, A. and Wu, B.
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