A Randomized Controlled Trial of a School-based Wearable Device-Supported Outdoor Activity Program for Myopia Prevention in Children With Adequate Hyperopic Reserve
This is a prospective, school-based randomized controlled trial designed to evaluate a wearable device-supported outdoor activity program for myopia prevention in primary school students with adequate hyperopic reserve. Enrolled students in grades 1 to 4 will be randomly assigned to either a wearable device-supported outdoor activity program plus routine school-based eye health education or routine school-based eye health education alone. Outcomes will include changes in axial length and cycloplegic spherical equivalent refraction, incident myopia, intervention adherence, and safety outcomes over 12 months.
• Students in grades 1 to 4 from participating schools.
• Non-myopic children with adequate hyperopic reserve at baseline, defined as cycloplegic spherical equivalent refraction in the worse eye within the following age-specific reference ranges: +1.72 D to +2.45 D at age 6 years; +1.48 D to +2.00 D at age 7 years; +1.19 D to +1.79 D at age 8 years; +1.11 D to +1.38 D at age 9 years; +0.92 D to +1.16 D at age 10 years; and +0.83 D to +1.07 D at age 11 years.
• Written informed consent provided by a parent or legal guardian, with assent obtained from the child when appropriate.