放射状角膜切开术后人工晶状体屈光度计算的临床观察  

Clinical observation of intraocular lens calculation in eyes with previous radial keratotomy

作　　者：朱珂珂 穆红梅 Ke-Ke Zhu;Hong-Mei Mu(Department of Ophthalmology,Kaifeng Central Hospital,Kaifeng 475000,Henan Province,China)

机构地区：[1]中国河南省开封市中心医院眼科

出　　处：《国际眼科杂志》2019年第11期1967-1969,共3页International Eye Science

摘　　要：目的:评估Barrett True K公式应用于放射状角膜切开术(RK)术后的白内障患者的屈光准确性。方法:选取2017-02/2019-02在我院确诊为RK屈光手术后的白内障患者22例42眼,术前分别用两种方法计算人工晶状体屈光度:(1)选取术眼角膜中央直径3mm区域最小的前表面K值,应用SRK/T公式计算,目标屈光度设为-1.0D;(2)用Barrett True K在线计算公式,选择RK术后模式,目标屈光度设为-1.0D。术后3mo检查术眼屈光状态,对比两种方法计算的屈光误差。结果:术后3mo,Barrett公式法屈光误差为0.61(-0.37,0.88)D,明显低于传统公式法的0.35(-0.25,0.63)D(P<0.05);屈光误差绝对值比较无差异(P>0.05)。传统公式法屈光误差在±0.5、±1.0、±2.0D的范围的分别占21%、45%、90%,Barrett公式法屈光误差在±0.5、±1.0、±2.0D的范围的分别占31%、74%、100%(P<0.05)。结论:Barrett True K在线公式应用于RK术后的白内障患者可达到较满意的屈光状态。AIM:To evaluate the accuracy of the Barrett True K intraocular lens(IOL)calculation formulas in eyes with previous radial keratotomy(RK).METHODS:From February 2017 to February 2019,42 eyes of 22 cataract patients with previous RK were selected in our hospital.Two methods were used to calculate IOL refraction before surgery:1)Selected the smallest anterior surface K value in the area of 3mm central corneal diameter,used SRK/T formula,the target refraction was set at-1.0D;2)Used Barrett True K on-line calculation formula,the mode of RK was selected and the target refraction was set at-1.0D.Three months after operation,the refractive state of the eyes was examined and the refractive errors calculated by the two methods were compared.RESULTS:The average refractive error of Barrett formula method was 0.61(-0.37,0.88)3mo after operation,which was significantly lower than that of traditional formula method 0.35(-0.25,0.63)D(P<0.05).There was no significant difference in absolute refractive error between the two methods(P>0.05).The refractive errors of traditional formula method in the range of±0.5D,±1.0D,±2.0D accounted for 21%,45%,90%respectively.The refractive errors of Barrett formula method in the range of±0.5D,±1.0D,±2.0D accounted for 31%,74%,100%respectively(P<0.05).CONCLUSION:Barrett True K online formula applied to cataract patients after RK can achieve satisfactory refractive status.

关 键 词：放射状角膜切开术 白内障 屈光误差 BARRETT TRUE K公式 

分 类 号：R57[医药卫生—消化系统]