非睫状肌麻痹自动验光法筛查7～9岁儿童屈光不正效果评价

目的探讨非睫状肌麻痹自动验光法筛查7～9岁儿童屈光不正的真实性、有效性及适应的阳性界值,为7～9岁儿童屈光不正寻找简便可行的筛查方法。方法采用整群抽样获得7～9岁儿童样本209人,分别采用TOPON-10电脑自动验光仪非睫状肌麻痹自动验光法和托品卡胺睫状肌麻痹后检影法进行检查。结果209例调查对象(418只眼)非睫状肌麻痹自动验光法较睫状肌麻痹后检影法结果近视屈光度数增大,远视屈光度数减小。筛查评价中:将SE≤-0.75D作为近视屈光的阳性界值时,约登指数为0.81,阳性预测值为71.6%,有较高的真实性;SE在各取值状态下,作为远视屈光筛查的真实性均不高;?DC?≥1.0D作为散光的阳性界值时,约登指数为0.84,阳性预测值为85.2%,有较高的真实性。结论非睫状肌麻痹自动验光法对7～9岁学龄儿童的近视屈光和散光筛查是可行的。

Assessment of Noncycloplegic Autorefraction in Screening for Refractive Error in 7-9 Years Old Children

Objective To assess the accuracy and efficacy of the TOPON-10 autorefractor in screening for refractive error in 7-9 years old children and try to define the positive threshold of refractive error in non-cycloplegic conditions.Methods A sample of 209 schoolchildren was obtained from a cluster sampling and informed consent.Noncycloplegic autorefraction with Topcon-10 autorefractor and cycloplegic retinoscopy were performed in each eye.Results Noncycloplegic measurementd of equivalent spheres were consistently more negative or less positive than those after cycloplegia.As far as myopia concerned,-0.75D was the ideal threshold for its high facticity(Youden index was 0.81,positive predictive value was 71.6%).As far as astigmatism concerned,the indeal threshold was 1.0D for its high facticity(Youden index was 0.84,positive predictive value was 85.2%).Conclusion Noncycloplegic autorefraction with topcon-10 autofractor is a feasible screening method to screen refractive error in 7-9 years old school children.