·AIM:To investigate the poor vision prevalence and myopia status among students aged 6-14 years old.·METHODS:Cluster random sampling method was taken to choose 11 schools in the Baoshan district of Shanghai.The visual acuity were examined in children aged 6-14 years.The poor vision students were examined with the computer optometry after cycloplegia.The relationship of vision and refraction status were analysed.·RESULTS:The prevalence rate of poor vision and myopia among students aged 6-14 had a tendency of increase with age.20.10% of students aged 6 were poor vision and 6.20% of them were myopia.78.50% of students aged 13-14 were poor vision and 73.72% of them were myopia,whereas only 41.43% of students aged 12.There were no significant differences between boys aged 6-8 and girls with respect to the prevalence rate of poor vision and myopia,while in girls over 9 years were obviously higher than that of boys.The prevalence rate of moderate,high and severe myopia in girls were all obviously higher than boys.·CONCLUSION:There is a gradual upward trend of the prevalence rate of poor vision and myopia among students aged 6-14 years.The prevalence of myopia in girls was serious than boys.·