Impact of Treatment Decentration on Higher-Order Aberrations after SMILE.
Impact of Treatment Decentration on Higher-Order Aberrations after SMILE.
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DOI：
10.1155/2017/9575723
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发表时间：
2017
影响因子：
1.9
通讯作者：
Chen H
中科院分区：
文献类型：
--
作者：
Yu Y;Zhang W;Cheng X;Cai J;Chen H
目的。目的评价飞秒激光小切口晶状体摘除(SMILE)和准分子激光准分子激光角膜磨镶术(SBK)后的中心位置及其对高阶像差(HOA)的影响。方法：研究方法。前瞻性、非随机、对照研究。其中微笑组52例96眼，SBK组49例96眼。术后6个月计算偏心度数。分别于术前、术后6个月对两组患者进行HOA及术后视力检查。结果。SILE组的平均偏心位移明显小于SBK组(P=0.020)。微笑和SBK后眼球中心偏心在0.50 mm以内。微笑组垂直偏心与球差的相关性不显著(P=0.035)。偏心与安全指数、疗效指数、垂直彗差、球差、均方根值(rms，μm)相关(均P<0.05)。两组裸眼和矫正远视力、安全指数、疗效指数和微笑后任何分界值的波前像差差异均无统计学意义(均P>；0.05)。浓度大于0.37 mm对垂直昏迷和均方根值有影响(P=0.002，0.005)。结论。微笑矫正术较SBK矫正术更准确。垂直偏心与微笑中诱发的球差有关。
Purpose. To evaluate decentration following femtosecond laser small incision lenticule extraction (SMILE) and sub-Bowman keratomileusis (SBK) and its impact on higher-order aberrations (HOAs). Methods. Prospective, nonrandom, and comparison study. There were 96 eyes of 52 patients who received SMILE and 96 eyes of 49 patients who received SBK in this study. Decentration was calculated 6 months after surgery with Pentacam. HOAs and visual acuity after the surgery were examined for patients in both groups before and 6 months after surgery. Results. The mean decentration displacement in SMILE group was significantly less than SBK group (P = 0.020). 89 eyes were decentered within 0.50 mm after SMILE and SBK. The association between vertical decentration and the induced spherical aberration was insignificant in SMILE group (P = 0.035). There was an association between decentration and safety index, efficacy index, vertical coma, spherical aberration, and HOAs in root mean square (RMS, μm) after SBK (all P < 0.05). No difference was found in uncorrected and corrected distance visual acuity, safety index, efficacy index, and wavefront aberrations between the two subgroups at any delimited value after SMILE (all P > 0.05). Decentration exceeding 0.37 mm affected vertical coma and RMSh of SBK eyes (P = 0.002, 0.005). Conclusion. SMILE surgery achieved more accurate centration than SBK surgery. Vertical decentration is associated with the induced spherical aberration in SMILE.