Analysis of poor vision conditions and risk factors of myopia in primary school He'xi district of Sanya / 国际眼科杂志(Guoji Yanke Zazhi)

AIM:To evaluate the poor vision condition and analyze the myopia etiological factor in primary school He'xi district of Sanya. METHODS: A cohort of 1 218 subjects were recruited randomly from grade 1~6 of two primary schools. Visual activity test, dioptroscopy and risk factor questionnaire were evaluated. RESULTS: The prevalence of poor vision was 29. 55%. The incidence of myopia increased with grade, and was significantly higher in girls than that in boys. The outdoor activity time of myopic pupil ( 7. 25 ± 5. 35h/wk ) was significantly lower than emmetropic pupil (11. 86±6. 65h/wk) ( P CONCLUSION: The increase of myopia incidence is closely related with sparing outdoor activity and excess usage of electronic product.