6～14岁正常视力和视力低下学生的眼屈光状态分析

Analysis of Refraction Status among 6～14-year-old Students with Normal and Poor Vision

目的：了解各年龄组学生眼屈光度水平，探讨儿童视力与眼屈光的关系。方法：采用整群抽样法，抽取6～14岁742名学生进行视力检查与眼屈光度测定。结果：正常视力值的学生中，有3．04％的学生屈光状态已成近视眼；在视力低下学生中，小学低年级以远视眼居多，小学四年级至初中二年级学生以近视眼所占比例大。学生眼屈光度P50值随年龄组上升而递减。结论：对于视力低下、视力有下降倾向而仍处在正常视力值范围内的儿童均应作眼屈光检查，以便及时发现近视眼，施行早期防治。

Objective: To understand the refraction change among children in different age gioups and to study the relationship between visual acuity and refraction. Methods: Visual acuity and diopter were examined in 742 children aged 6~ 14 years. Results:Among children with the normal vision, 3. 04% were considered to suffer from myopia by refratometry. hyperopes were common among primary school children at lower grades. however, myopes were common among primaly school children at higher grades and junior school students. The 50th percentile of diopter decreased with age. Couclusions: Refration examination shauld be done among children with poor vision and hypopsia proneness to discover and treat myopia earier.