Effect of Increasing Time Spent Outdoors on Myopia Prevention in School-Aged Children in Northeast China

Development and Application of Appropriate Technology for Myopia Prevention and Control

The purpose of this study is to develop a school-based intervention aimed at prevent the onset and development of myopia among school aged children by increasing time spent outdoors in northeast China.

The purpose of this study is to develop a school-based intervention aimed at prevent the onset and development of myopia among school aged children by increasing time spent outdoors among elementary and secondary school students in northeast China. It is expected that the results will provide evidences for policy-makers and school healthcare providers for their school children myopia prevention.

Inclusion Criteria:

• Grade of 1 to 5 in elementary schools and grade of 7 to 8 in secondary schools.

Exclusion Criteria:

• Visual defect or other eye diseases; wearing orthokeratology; refractive surgery history.