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Journal of Ophthalmology
Volume 2018 (2018), Article ID 9781987, 6 pages
Research Article

Prevalence and Related Factors for Myopia in School-Aged Children in Qingdao

1Department of Ophthalmology, Qingdao Economic and Technological Development Area First People’s Hospital, Qingdao, Shandong 266555, China
2Department of Ophthalmology, Qingdao Traditional Chinese Medical Hospital of Huangdao District, Qingdao, Shandong 266500, China
3Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266000, China

Correspondence should be addressed to Da Bo Wang

Received 26 July 2017; Accepted 10 December 2017; Published 8 January 2018

Academic Editor: Malgorzata Mrugacz

Copyright © 2018 Jin Tao Sun et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Purpose. To investigate the prevalence and related factors for myopia in school-aged children in the Economic and Technological Development Zone of Qingdao, Eastern China. Methods. A total of 4890 (aged 10 to 15 years) students were initially enrolled in this study. 3753 (76.75%) students with completed refractive error and questionnaire data were analyzed. The children underwent a comprehensive eye examination. Multiple logistic regression models were applied to assess possible factors associated with myopia. Results. The prevalence of myopia increased as the children’s grade increased (, ). Low myopia was the main form of myopia in adolescent students (30.22%). With the growth of age, students spent significantly more time on near work () and less time on outdoor activity (). In multivariate models, only the following variables were significantly associated with myopia: age, two myopic parents, outdoor activity time, and continuous near work without 5 min rest. Conclusions. The prevalence of myopia increased as the grade increased. Age, two myopic parents, and continuous near work time without 5 min rest were risk factors for myopia. Outdoor activities had protective effect for myopia.