角膜塑型术治疗近视的临床应用

目的对角膜塑型术治疗近视进行初步分析。方法根据患者眼球参数，选择定制特殊设计的硬性角膜接触镜片治疗近视和近视散光，治疗1d、1、2、3、4wk观察，以后每4wk1次观察视力、屈光度、角膜曲率、角膜偏心率的变化，随访18mo。结果治疗后784眼视力、屈光度、角膜曲率、e值均发生变化。低度近视280眼屈光度平均降低-2.75D±0.50D，水平SimK(D)平均降低1.64±0.21，垂直SimK平均降低0.92±0.27，e值平均减小0.47±0.11；中度近视327眼及高度近视177眼屈光度、角膜曲率、e值呈同方向变化但程度各不相同。中、低度近视治疗预测性较好，高度近视预测性较差。存在视力不稳定，角膜形态异常改变等问题。结论角膜塑型术是一种非创伤性治疗近视的方法，临床应用应严谨而科学。

Orthokeratology fortreating myopia:a report of clinical application

Objective　To make a preliminary analysis of orthokeratology(OK) for treating myopia.Methods　OK lenses were chosen to treat myopia with or without astigmatism according to the myopia characterizations, then changes of their visions, refractions, corneal curvature and eccedtricities after being treated for ld, 1、2、3、4 weeks were observed once every 4weeks and were followed up for 18 months.Results　Significant changes were observed after being treated. Slight myopia: the diopters decreased-2.75D±0.50D,the horizontal meridians flattened 1.64±0.21, the vertical 0.92±0.27 and the eccedtricities declined 0.47±0.11; Middle myopia: the diopters decreased -5.50D±0.75D,the horizontal meridians flattened 2.16±0.45, the vertical 1.61±0.67, and the eccedtricities declined 0.38±0.07; High myopia:the diopters did -6.75D±0.50D,the horizontal did 3.86±0.56, the vertical 2.97±0.67 and the eccedtricities did 0.32±0.10. The predicabilities of slight and middle myopia were superior to high myopia's.Conclusion　Orthokeratology is a non-traumatic therapy and the clinical application should be careful and scientific.