[A retrospective study on the progression of myopia in school-age children].

Objective: To study the progression of myopia in school-age children over the past 12 years and factors influencing myopia progression.

Methods: A total of 4569 cases of 5 to 12-year-old children who had refractive examinations in the Third Xiangya Hospital, Central South University between January 2000 and December 2011 were enrolled in this study. The children had no family history of congenital high myopia or other eye diseases.

[Influence of near-work and outdoor activities on myopia progression in school children].

Objective: To study the influence of near-work and outdoor activities on myopia progression in school children.

Methods: Eighty 7-11-year-old school children with myopia were randomly assigned into an intervention group (n=41) and a control group (n=39). The children in the intervention group did near- and middle-vision activities less than 30 hrs per week and more outdoor activities than 14-15 hrs per week.