 |
| Research article summary (published 30 May 2009): |
Associations between near work, outdoor activity, and myopia among adolescent students in rural China: the Xichang Pediatric Refractive Error Study report no. 2.
Full Abstract
OBJECTIVE: To study the associations between near work, outdoor activity, and myopia among children attending secondary school in rural China. METHODS: Among a random cluster sample of 1892 children in Xichang, China, subjects with an uncorrected acuity of 6/12 or less in either eye (n = 984) and a 25% sample of children with normal vision (n = 248) underwent measurement of refractive error. Subjects were administered a questionnaire on parental education, time spent outdoors, and weekly time spent engaged in and preferred working distance for a variety of near-work activities. RESULTS: Among 1232 children with refraction data, 998 (81.0%) completed the near-work survey. Their mean age was 14.6 years (SD, 0.8 years), 55.6% were girls, and 83.1% had myopia of -0.5 diopters or less (more myopia) in both eyes. Time and diopter-hours spent on near activities did not differ between children with and without myopia. In regression models, time spent on near activities and time outdoors were unassociated with myopia, adjusting for age, sex, and parental education. CONCLUSIONS: These and other recent results raise some doubts about the association between near work and myopia. Additional efforts to identify other environmental factors associated with myopia risk and that may be amenable to intervention are warranted.
Author information
Author/s: Lu, Bei (B); Congdon, Nathan (N); Liu, Xiaojian (X); Choi, Kai (K); Lam, Dennis S C (DS); Zhang, Mingzhi (M); Zheng, Mingwei (M); Zhou, Zhongxia (Z); Li, Liping (L); Liu, Xueyu (X); Sharma, Abhishek (A); Song, Yue (Y);
Affiliation: Joint Shantou International Eye Center of Shantou University and Chinese University of Hong Kong, Shantou, Guangdong, China.
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Archives of ophthalmology (Arch Ophthalmol), published in United States. (Language: eng)
Reference: 2009-Jun; vol 127 (issue 6) : pp 769-75
Dates: Created 2009/06/09; Completed 2009/06/26;
PMID: 19506196, status: MEDLINE (last retrieval date: 6/26/2009, IMS Date: 26 Jun 2009 00:00:00)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
External Links for this article
(including full text providers, if available):
Click Electronic Full-text Provider Links to see options for finding the electronic full text links to this article. Note there may be a subscription or fee required for access to the full text. See our FAQ for information on finding FREE full text articles.
This article may also be located in paper journal collections available in many libraries. Use the Journal and Publication Information above to find the full article.
MeSH headings (categories)
This article was linked to the MESH Headings shown below.
Related articles
This article has not been indexed for related articles as yet, however you can still use the live related article search links below.
See a large map of 100+ related articles.