278
Participants
Start Date
March 25, 2021
Primary Completion Date
August 31, 2022
Study Completion Date
August 31, 2022
LLLT(Low Level Laser Therapy)
2 times a day, 3 minutes each time, with an interval of more than 4 hours. During the semester: From Monday to Friday, set up an intervention room in the school; For winter and summer vacation: everyday at home
Xiangui He, Shanghai
Shanghai Eye Disease Prevention and Treatment Center
OTHER