方法：于2009/2011年的3～6月份连续3a调查了长沙市内所有的初中及小学生的视力情况，并对3a的视力检查资料进行分析。

结果：长沙市初中、小学生视力低下发生率和症状严重程度呈上升趋势，2009/2011年学生视力低率分别为50.12%，52.59%和55.91%。女生视力低下率高于男生。

结论：长沙市初中、小学生视力不良情况较严重，尤其小学生视力低下率逐年加重，其中女生比例较男生高，应当引起家长和学校的全面关注。

METHODS: All students in the junior middle schools and primary schools of Changsha were enrolled for vision examination from March to June in 2009, 2010, and 2011. Data obtained from the investigation was analyzed.

RESULTS: The incidence and severity of low vision increased during the three years. The incidence of low vision was 50.12%, 52.59% and 55.91% in 2009, 2010, and 2011 respectively. Female pupils had a higher incidence of low vision than males.

CONCLUSION:Poor vision is severe among junior middle school and primary school students in Changsha, especially among junior middle school students and female students. Parents and school teachers should pay more attention to this problem.