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目的了解柴达木地区初中生视力变化情况及规律。方法 2007-2010年每2年进行一次追踪观察,监测德令哈市某中学321名初中学生视力情况,用SPSS 11.5统计软件,采用χ2检验等方法进行资料分析其视力低下的变化,对学生在不同学习阶段视力变化规律作出分析。结果男生的视力低下率由30.91%上升到48.49%,女生由32.05%上升到50.64%,男女生的轻度视力低下率最终减少,中、重度视力低下率逐年增加。结论女生视力低下率较男生高,但无统计学意义(P(0.05);随着学年的增加,本地区初中生中、重度视力低下率逐年升高。
Objective To understand the changes of visual acuity and regularities of junior high school students in Qaidam area. Methods A follow-up observation was conducted every two years from 2007 to 2010 to monitor the visual acuity of 321 middle school students in a middle school in Delingha city. SPSS11.5 statistical software and χ2 test were used to analyze the changes of their eyesight. Learning stage changes in the rules of vision to make an analysis. Results The prevalence of vision loss in boys increased from 30.91% to 48.49%, while that in girls increased from 32.05% to 50.64%. The prevalence of mild hypoplasia in boys and girls eventually decreased, and the rate of moderate and severe hypopia was increasing year by year. Conclusion The prevalence of visual impairment in girls is higher than that in boys, but not statistically significant (P <0.05). With the increase of academic year, the prevalence of moderate and severe visual acuity in junior high school students has been increasing year by year.