放射状角膜切开术术后远期屈光状态及影响因素分析

A long-term study on refractive status and influence factors after radial keratotomy

目的探讨国人放射状角膜切开术(RK)术后远期的屈光状态及影响因素。方法对115例(226眼)RK术后患者检查远视力,电脑验光及显然验光矫正视力,应用角膜曲率计测量角膜曲率,非接触眼压计测量眼压,以及A型超声生物测量仪测眼轴长度。结果随访时远视力平均值为0.908 9,远视力大于或等于1.0占59.2%,远视力大于或等于0.5占91.1%。多元线性分析中对等效球镜下降有影响的因素为术前近视度数、眼轴、性别、角膜切口刀数。结论 RK术后远期多数患者屈光状态良好,术后影响远期屈光状态的因素有术前近视度数、角膜切口数、眼轴、性别。

Objective To investigate the refractive status of patients undergone radial keratotomy（PK） and the influencing factors.MethodsThe distant vision was tested for the 115 cases（226 eyes） who underwent RK.The computer vision-testers were utilized to carry out the optometry,and the keratometer was utilized to measure the eye curvature.The intraocular pressure was measured using non-contact tencnomete,and the optic axis length was measured using the A-scan.ResultsWhen following up,the mean value of the distant vision was 0.908 9.59.2% of all cases had a distant vision of not less than 1.0,and 91.1% had a distant vision of not less than 0.5.In the multiple linear regression analysis,the significant factors for the diminishing of spherical equivalent refraction were the preoperative equivalent sphere,optic axis length,sex and the number of cut.ConclusionIn the long term after the RK operation,most patients are in good corneal refraction.The influencing factors are the myopic degree of preoperative,number of incisions,optic axis length and gender,indicating that all these factors should be paid more attention to in the future corneal refractive surgery.