目的:研究小切口微透镜摘除(SMILE)和飞秒激光辅助LASIK(FS-LASIK)后浓度分析的新方法的可重复性和可重复性。
方法:本研究包括接受SMILE治疗的29只眼和接受FS-LASIK治疗的24只眼。分别使用切向图和厚度图差异图分析了分散。两个差异图都是由Scheimpflug断层摄影师(Pentacam)为每只眼睛生成的,使用术前扫描和术后3个月扫描。通过计算组内相关系数(ICC)评估重复性和再现性,受试者内标准偏差(Sw),和重复性系数(CR)。
结果:ICC,Sw,CR在两张地图上定位光学区(OZ)中心的坐标时显示出良好至出色的可重复性,值范围分别为0.84至0.96、0.03至0.13和0.08至0.36。切向曲率差图(dTC)和厚度差图(dPC)上的术前角膜顶点的总偏心的可重复性适中且良好,分别。ICC,Sw,dTC的CR分别为0.63、0.09和0.25。ICC,Sw,dPC的CR分别为0.77、0.10和0.28。对于切向差异图(ICC≥0.97),OZ中心测量的可重复性非常好,对于厚度差异图(ICC≥0.86)也很好。ICC,Sw,和CR表现出优异的dTC重现性,值分别为0.95、0.03和0.08。ICC,Sw,CR对dPC具有良好的重现性,值分别为0.89、0.06和0.17。
结论:本研究中使用的浓度分析方法在定位切向和厚度差图上的OZ中心坐标方面表现出良好至出色的可重复性和可重复性。
OBJECTIVE: To investigate the repeatability and reproducibility of a new method for centration analysis after small incision lenticule extraction (SMILE) and femtosecond laser-assisted LASIK (FS-LASIK).
METHODS: This study comprised 29 eyes treated with SMILE and 24 with FS-LASIK. Decentrations were analyzed using tangential and pachymetry difference maps respectively. Both difference maps were generated with a Scheimpflug tomographer (Pentacam) for each eye, using preoperative and 3-month postoperative scans. Repeatability and reproducibility were evaluated by calculating the intraclass correlation coefficient (ICC), within-subject standard deviation (Sw), and coefficient of repeatability (CR).
RESULTS: ICC, Sw, and CR showed good to excellent repeatability in locating the coordinates of the optical zone (OZ) center on both maps, with values ranging from 0.84 to 0.96, 0.03 to 0.13, and 0.08 to 0.36 respectively. The repeatability of the total decentration from the preoperative corneal vertex on the tangential curvature difference maps( d TC ) and the pachymetry difference maps( d PC ) were moderate and good, respectively. The ICC, Sw, and CR of d TC were 0.63, 0.09, and 0.25, respectively. The ICC, Sw, and CR of d PC were 0.77, 0.10, and 0.28, respectively. The reproducibility of the OZ center measurements was excellent for the tangential difference maps (ICC ≥ 0.97 ) and good for the pachymetry difference maps (ICC ≥ 0.86). ICC, Sw, and CR showed excellent reproducibility of d TC , with values of 0.95, 0.03, and 0.08, respectively. ICC, Sw, and CR showed good reproducibility of d PC , with values of 0.89, 0.06, and 0.17, respectively.
CONCLUSIONS: The centration analysis method used in this study showed good to excellent repeatability and reproducibility in locating the coordinates of the center of the OZ on the tangential and pachymetry difference maps.