Accuracy of noncycloplegic autorefraction in school-age children in China
Accuracy of noncycloplegic autorefraction in school-age children in China
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DOI：
10.1097/00006324-200401000-00010
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发表时间：
2004-01-01
影响因子：
1.4
通讯作者：
Ellwein, LB
中科院分区：
文献类型：
--
作者：
Zhao, JL;Mao, J;Ellwein, LB
目的。旨在评估中国学龄儿童代表性样本中非散瞳验光的准确性。方法。对 4973 名 7 至 18 岁儿童的人群样本进行了使用自动验光仪测量环喷托酯诱导睫状肌麻痹之前和之后的屈光不正。以 Jackson 交叉柱镜（J(0) 和 J(45)）为代表的球面等效屈光不正和散光是主要结果指标。结果。等效球体的非睫状肌麻痹测量始终比睫状肌麻痹后的测量值更负或更弱正，平均 +/- SD 差异为 -1.23 +/- 0.97 D。对于远视眼，差异特别大（远视至少 +2.00 D 的平均差异为 -2.98 +/- 1.65 D），而对于正视眼，差异逐渐变小，对于近视眼则更小（平均差异为 -0.41 +/- 0.97 D） -2.00 D 或以上近视为 0.46 D）。年龄的增加与差异的增加有关，但临床上不显着。非散光散光测量与散光散光测量之间几乎没有差异：平均 J(0) 和 J(45) 差异分别为 -0.08 +/- 0.13 D 和 -0.01 +/- 0.09 D。结论。研究发现，非散瞳验光对于学龄儿童来说非常不准确，因此不适合研究该人群的屈光不正或配镜。
Purpose. To evaluate the accuracy of noncycloplegic autorefraction in a representative sample of school-age children in China. Methods. Refractive error was measured with an autorefractor, both before and after cycloplegia induced with cyclopentolate, in a population-based sample of 4973 children between the ages of 7 and 18 years. Spherical equivalent refractive error and astigmatism as represented by Jackson crossed-cylinders (J(0) and J(45)) were the main outcome measures. Results. Noncycloplegic measurements of equivalent spheres were consistently more negative or less positive than those after cycloplegia, with mean +/- SD differences of -1.23 +/- 0.97 D. The differences were particularly large for hyperopic eyes (mean difference of -2.98 +/- 1.65 D for hyperopia of at least +2.00 D) while becoming progressively smaller for emmetropic eyes, and smaller yet for myopic eyes (mean difference of -0.41 +/- 0.46 D for myopia of -2.00 D or more). Increasing age was associated with increased, but clinically insignificant, differences. Little difference was found between noncycloplegic and cycloplegic measurements of astigmatism: mean J(0) and J(45) differences were -0.08 +/- 0.13 D and -0.01 +/- 0.09 D, respectively. Conclusions. Noncycloplegic autorefraction was found to be highly inaccurate in school-age children and, thus, not suitable for studies of refractive error or for prescription of glasses in this population.