角膜矫形术中角膜偏心率与预后

Corneal eccentricity and prognosis in othokeratologic operation

目的 探讨角膜偏心率是否可作为角膜矫形术预后的一个有价值的参数。方法 １２ 例患者２４ 眼，进行了眼部检查、验光、角膜地形图测定角膜偏心率等，然后配戴逆几何型ＲＧＰ镜片，随访期均在４ｍｏ 以上。结果 角膜偏心率与角膜可能发生的屈光度变化、验光度数的变化密切相关，（ Ｐ＜０－０１） ；角膜偏心率与可能的视力提高没有明显的相关性，（Ｐ＞０－０５） ，角膜中央３ｍ ｍ 区域与７ｍｍ 之间的屈光度之差，与角膜屈光度变化、验光变化、视力改变无明显相关性。结论 角膜偏心率值可作为角膜可能发生的屈光度改变的预测性因素。

Objective To determine whether or not corneal eccentricity can be regarded as a predictor for orthokeratologic changes.Methods Twelve subjects enrolled in the study.For each subject,eye examination,refraction and corneal topography were performed.Each subject then was fitted with a rigid contact lens for orthokeratology and followed for a minimum of 4 months. Results Corneal eccentricity had a high relationship with the change of power of corneal and refraction,no correlation between corneal eccentricity and improvement in visual acuity.Conclusion Corneal eccentricity can be regarded as a predictor for the change of power of corneal