Parapapillary beta zone in primary school children in Beijing: associations with outdoor activity.

PURPOSE To investigate prevalence and size of parapapillary alpha zone and beta zone and associations with myopia-related factors in primary school children in Beijing. METHODS The school-based study included 382 grade-1 children and 299 grade-4 children. The children underwent a comprehensive eye examination and the parents, an interview. The examination… CONTINUE READING