China, where the prevalence of myopia is near 90% for high-schoolers, has mandated less screen time, less homework, and required outdoor time. It appears to hav

China, where the prevalence of myopia is near 90% for high-schoolers, has mandated less screen time, less homework, and required outdoor time. It appears to have some effect as there's a small decrease in myopia: https://www.youtube.com/watch?v=3YWbR8K0jT4 https://www.youtube.com/watch?v=3YWbR8K0jT4