Effects of outdoor activities on myopia among rural school children in Taiwan

Ophthalmic Epidemiol. 2010 Oct;17(5):338-42. doi: 10.3109/09286586.2010.508347.


Purpose: The aim was to identify the prevalence and risk factors of myopia among elementary school students in a rural area of Taiwan.

Methods: A cross-sectional study was conducted. Elementary school students aged 7-12 years were recruited from the two schools located on Chimei Island. Data were obtained by means of a parent questionnaire and ocular evaluations that included axial length and cycloplegic autorefraction.

Results: One hundred and forty five students were recruited for this study. Myopia prevalence was 31%. In univariate analysis, myopia was significantly associated with school year, myopic parent, and watching television (TV) (P < .0001, =0.007 and =0.029, respectively). Multiple logistic regression analysis revealed that myopia was significantly associated with school year and myopic parent. However, the effect of watching TV was not statistically significant (P=0.059). Outdoor activity showed significance and was inversely associated with myopia (Odds Ratio [OR]=0.3, 95% Confidence Interval [CI]=0.1-0.9, P=0.025).

Conclusion: This study suggests that outdoor activities might be an important protecting factor for myopia in rural school children.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Child
  • Child Behavior
  • Cross-Sectional Studies
  • Female
  • Humans
  • Leisure Activities*
  • Male
  • Myopia / epidemiology*
  • Prevalence
  • Risk Factors
  • Rural Population / statistics & numerical data*
  • Schools
  • Sedentary Behavior
  • Surveys and Questionnaires
  • Taiwan / epidemiology
  • Television
  • Visual Acuity