The study is a Randomized controlled trial based on digital interventions, involving pre-school children and their parents or major caregivers. To compare the myopia and physical and mental health status of preschool children before and after intervention between intervention group and control group, to confirm the effect of digital intervention on prevention and control of Myopia and physical and mental health of preschool children.
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Prevention and control of Myopia Health Literacy Rating Scale
Timeframe: 0,6month,12month
Myopia screening
Timeframe: 0,6month,12month
BMI
Timeframe: 0, 6month,12month
Strength and Difficulties Questionnaire
Timeframe: 0,6month,12month