角膜形态及视觉质量对角膜塑形镜试戴结果的影响

摘要

目的 探讨角膜形态及视觉质量对角膜塑形镜试戴成败的影响.方法 选择在我院验配角膜塑形镜的患者38例(67眼).在戴镜前利用OPDⅢ-Scan进行检测,获得角膜表面规则指数(SRI)、角膜表面不对称指数(SAI)、Q值、4mm瞳孔直径下高阶像差的斯特列尔率(SR)、高阶像差的均方根(RMS)值,然后进行试戴,试戴成功者为成功组(45眼),试戴失败者为失败组(22眼),比较2组患者角膜形态及视觉质量的差异.结果 试戴角膜塑形镜成功组SRI、SAI、Q值、SR、RMS与失败组比较,差异均无统计学意义.结论 角膜塑形镜试戴成功与否与试戴前的角膜形态及视觉质量参数(SRI、SAI、Q值、RMS、SR)无关.%Objective To determine the parameters of corneal surface shape and optical quality that affect the results of trial fitting in overnight orthokeratology (OK lenses) in adolescents with myopia.Methods Thirty-eight subjects (67 eyes) who met the inclusion criteria were enrolled in this study.The parameters of corneal surface shape including surface regularity index (SRI),surface asymmetry index (SAI),and Q value were assessed with a corneal topographer before beginning orthokemtology.The Strehl ratio (SR) and the root-mean-square (RMS) of the total higherorder aberrations in a 4-mm pupil were measured before the trial fitting.Participants who had tried orthokeratology were divided into two groups according to the success or failure of trial fitting.Then,we compared the differences in the comeal surface shape and optical quality between the two groups.Results There were 45 eyes in the success group,and 22 eyes in the failure group.There were no statistically significant differences for SRI (P =0.188),SAI (P =0.338),Q value (P =0.657),RMS (P =0.456),and SR (P =0.479) in the two groups.Conclusion The result of trial fitting in orthokemtology is not correlated with the parameters of comeal status and optical quality (SRI,SAI,Q value,RMS,SR).