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目的 为了了解东莞市厚街镇中心小学学生的视力情况。方法 采用标准对数视力表 (GB 1 1 5 33- 89) ,连续 3年(2 0 0 0 - 2 0 0 2年 )分别对该校全体学生进行检测。结果 2 0 0 2年和 2 0 0 1年的近视率要显著高于 2 0 0 0年 (χ20 0 -0 1 =5 8.6 4 ,χ20 0 -0 2=5 2 .39,均P <0 .0 1 ) ,且各年度高年级的近视率显著高于低年级 ,并有随年级增高的趋势 ;(χ2 分别为 1 2 5 .90、1 91 .2 7、4 5 .35 ,P均 <0 .0 1 ) ,一年级近视率也有随年度增高的趋势 (χ2 =2 4 .2 6 ,P <0 .0 1 ) ,并急剧增长。结论 该校学生的近视率有逐年增高的趋势应采取相应措施加以控制
Objective To understand the sight of primary school students in Houjie Town, Dongguan City. Methods The standard logarithmic visual acuity chart (GB 1 1 5 33-89) was used to detect all the students in the school for three consecutive years (2000-2002). Results The myopia rate in 2001 and 2001 was significantly higher than in 2000 (χ20 0 -0 1 = 5 8.6 4, χ20 0 -0 2 = 52.239, all P <0 .0 1), and the annual incidence of myopia in higher grades was significantly higher than that in lower grades, and there was a tendency to increase with grades; (χ2 = 125.95, 91.27, 4.55, P = <0 01). The first-grade myopia also showed a trend of increasing with annual (χ2 = 2.42, P <0.01), and increased sharply. Conclusions The trend of the students’ myopia increasing year by year should take corresponding measures to control