International Journal of Medical Sciences

Impact factor
2.399

24 October 2017

ISSN 1449-1907 News feeds of published articles

My Manuscript | My Account

Journal of Genomics now in PubMed/PubMed Central. Submit manuscript...

Journal of Biomedicinenew

Theranostics

Journal of Cancer

Oncomedicine

International Journal of Biological Sciences

Journal of Genomics

Journal of Bone and Joint Infection (JBJI)

Nanotheranostics

PubMed Central Indexed in Journal Impact Factor

Int J Med Sci 2010; 7(6):342-353. doi:10.7150/ijms.7.342

Research Paper

Refractive Status and Prevalence of Refractive Errors in Suburban School-age Children

Lian-Hong Pi1, Lin Chen1, Qin Liu1, Ning Ke1, Jing Fang1, Shu Zhang1, Jun Xiao1, Wei-Jiang Ye1, Yan Xiong1, Hui Shi1, Zheng-Qin Yin2

1. Department of Ophthalmology, Children's Hospital, Chongqing Medical University, Chongqing, People's Republic of China
2. Southwest Hospital, Southwest Eye Hospital, The Third Military Medical University, Chongqing, People's Republic of China

Abstract

Objective: This study investigated the distribution pattern of refractive status and prevalence of refractive errors in school-age children in Western China to determine the possible environmental factors. Methods: A random sampling strategy in geographically defined clusters was used to identify children aged 6-15 years in Yongchuan, a socio-economically representative area in Western China. We carried out a door-to-door survey and actual eye examinations, including visual acuity measurements, stereopsis examination, anterior segment and eyeball movements, fundus examinations, and cycloplegic retinoscopy with 1% cyclopentolate. Results: A total of 3469 children living in 2552 households were selected, and 3070 were examined. The distributions of refractive status were positively-skewed for 6-8-year-olds, and negatively-skewed for 9-12 and 13-15-year-olds. The prevalence of hyperopia (≥+2.00 D spherical equivalent [SE]), myopia (≤-0.50 D SE), and astigmatism (≥1.00 diopter of cylinder [DC]) were 3.26%, 13.75%, and 3.75%, respectively. As children's ages increased, the prevalence rate of hyperopia decreased (P<0.001) and that of myopia increased significantly (P<0.001). Children in academically challenging schools had a higher risk of myopia (P<0.001) and astigmatism (≥1.00DC, P =0.04) than those in regular schools. Conclusion: The distribution of refractive status changes gradually from positively-skewed to negatively-skewed distributions as age increases, with 9-year-old being the critical age for the changes. Environmental factors and study intensity influence the occurrence and development of myopia.

Keywords: refractive error, suburban school-age children, myopia

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) License. See http://ivyspring.com/terms for full terms and conditions.
How to cite this article:
Pi LH, Chen L, Liu Q, Ke N, Fang J, Zhang S, Xiao J, Ye WJ, Xiong Y, Shi H, Yin ZQ. Refractive Status and Prevalence of Refractive Errors in Suburban School-age Children. Int J Med Sci 2010; 7(6):342-353. doi:10.7150/ijms.7.342. Available from http://www.medsci.org/v07p0342.htm