The purpose of this study is making use of school policy- recess outside classroom (ROC7-11) for increasing the time spent outdoor during recess and encouraging children spent time outdoor up to 11 hours in each week to investigate the vision change, myopia onset and progression in these schoolchildren.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
1,020
Outdoor activity in recess time
Department of Ophthamology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung university College of Medicine
Kaohsiung City, Taiwan
Cycloplegic refraction
Time frame: 1 year
Axial length
Time frame: 1 year
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