Astigmatism in Chinese preschool children: prevalence, change, and effect on refractive development
Astigmatism in Chinese preschool children: prevalence, change, and effect on refractive development
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DOI：
10.1136/bjo.2003.030338
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发表时间：
2004-07-01
影响因子：
4.1
通讯作者：
Lam, DSC
中科院分区：
文献类型：
--
作者：
Fan, DSP;Rao, SK;Lam, DSC
目的：了解中国学龄前儿童散光的患病率、类型、进展情况及其对屈光发育的影响。方法：随机抽取两所幼儿园对学龄前儿童进行横断面研究。初次检查五年后，对一部分儿童进行了队列研究。主要研究结果是屈光不正（通过散瞳验光测量）和眼轴尺寸（通过超声检查测量）。 结果：522 名儿童参与了这项研究；平均年龄为 55.7 个月（SD 10.9；范围 27 至 77 岁）。平均柱镜读数为-0.65 D（SD 0.58；范围0.00至-4.75），并且规则散光占主导地位（53%）。在纵向研究的 108 名儿童中，平均圆柱读数从 -0.62 D 降至 -0.50 D (p = 0.019)。初次检查时存在散光，导致眼睛近视程度加深（p < 0.001）。此外，散光增加的儿童的近视进展程度更大（p < 0.001），眼轴增长也更大（p = 0.002）。结论：本研究报告中国学龄前儿童散光患病率较高。散光的存在，特别是随着散光的增加，似乎使儿童容易患上进行性近视。进一步的研究是有必要的。
Aim: To study the prevalence, type, and progression of astigmatism in Chinese preschool children, and its effect on refractive development.Methods: A cross sectional study of preschool children was carried out in two randomly selected kindergartens. A cohort study was performed on a subset of children, five years after initial examination. Refractive error (measured by cycloplegic autorefraction) and axial ocular dimensions (measured by ultrasonography) were the main study outcomes.Results: 522 children participated in the study; the mean age was 55.7 months (SD 10.9; range 27 to 77). Mean cylinder reading was -0.65 D (SD 0.58; range 0.00 to -4.75), and with the rule astigmatism was predominant (53%). In the 108 children studied longitudinally, the mean cylinder reading reduced from -0.62 D to -0.50 D (p = 0.019). The presence of astigmatism in initial examination predisposed the eyes towards greater myopisation (p < 0.001). In addition, children with increased astigmatism had greater myopic progression (p < 0.001) and axial length growth (p = 0.002).Conclusions: This study reports a high prevalence of astigmatism in Chinese preschool children. The presence of astigmatism, and particularly with increasing astigmatism, appears to predispose the children to progressive myopia. Further studies are warranted.