[3a1405-08] 発育発達／口頭発表②

10:00 AM - 10:12 AM JST(1:00 AM - 1:12 AM UTC)

[07発-口-05] Effect of Indoor or Outdoor Sport Activity on the Development of Myopia in Chinese Schoolchildren

*Liang Li¹ (1. China Sport Science Society)

Objective: In order to provide more effective interventions to prevent the development of myopia, this study aimed to investigate the effect of indoor or outdoor sport activity on myopia onset and progression in Chinese schoolchildren. Methods: A total of 389 schoolchildren aged 9-12 years were randomly divided into either an indoor group, an outdoor group or a control group, all of them underwent a comprehensive eye examination at before and after the intervention. The ocular biometrics, including spherical refraction (SR), cylindrical refraction (CR), axial length (AL) and corneal curvature (CC) were measured with standard methods, and then the AL/CC ratio and spherical equivalent refraction (SER) were calculated. The indoor and outdoor group conducted a 12-week sport activity intervention in sports hall and playground, respectively. Myopia was defined as an SER≤−0.5 dioptre (D), all ocular biometrics data of right eye were used for analyses. Results: After intervention, new onset of myopia was significantly lower in indoor and outdoor group than control group (22.73% and 23.38% vs. 39.76%; p<.01). For myopic participants, both indoor and outdoor sport activity intervention reduced the myopic shift and AL/CC ratio, but did not achieve significance when compared with control group. Among nonmyopic participants, the mean progression of SER in the myopic direction was significantly lower in indoor and outdoor group than that of control group after intervention (0.20±0.57 D and 0.24±0.58 D vs. 0.44±0.68 D; p<.05). Conclusion: Among 9-12 years old schoolchildren, the addition of 120 minutes of indoor or outdoor sport activity per week have a significant effect on the control of myopia onset, but the positive effects on the reduce of myopia progression is weak. Further studies are suggested to prolong the intervention and investigate more comprehensive effects on the prevention and control of myopia in schoolchildren.