Background:To evaluate the precision of corneal higher-order aberrations measurements after small incision lenticule extraction(SMILE)using the Sirius Scheimpfug-Placido topographer(CSO,Italy).Methods:Seventy-fve eyes...Background:To evaluate the precision of corneal higher-order aberrations measurements after small incision lenticule extraction(SMILE)using the Sirius Scheimpfug-Placido topographer(CSO,Italy).Methods:Seventy-fve eyes from 75 postoperative subjects were included in this prospective study.Three consecutive corneal aberrometric measurements were obtained with the Scheimpfug-Placido topographer by two experienced operators to assess intra-and inter-observer reproducibility.The within-subject standard deviation(Sw),test-retest repeatability(TRT)and the intraclass correlation coefcient(ICC)were calculated.Results:For intraobserver repeatability of anterior and total corneal aberrations,all ICCs were more than 0.922,except for trefoil(0.722 to 0.768).The ICCs of total root mean square(RMS),coma Z(3,±1),and spherical aberration Z(4,0)were over 0.810 while higher-order RMS,trefoil Z(3,±3),and astigmatism II Z(4,±2)were below 0.634 for posterior corneal surface aberrations.All Sw values for all types of aberrations were equal to or below 0.07μm.Regarding interobserver reproducibility,all TRT values were no more than 0.12μm,0.05μm,and 0.11μm for anterior,posterior,and total corneal aberrations,respectively.The ICC values ranged from 0.875 to 0.989,from 0.686 to 0.976 and over 0.834 for anterior,posterior,and total corneal aberrations,respectively.Conclusions:The repeatability of measurements of anterior and total corneal aberrations with the Sirius system in corneas after SMILE surgery was high,except for trefoil.There was some variability in posterior corneal aberrometric measurements.High reproducibility of corneal aberrometric measurements was observed between measurements of both examiners,except for trefoil,with poor to moderate reproducibility.展开更多
目的评估Sirius光线追踪法测算角膜屈光术后人工晶状体(IOL)度数的准确性。设计比较性病例系列。研究对象2015年6月至2017年12月在北京爱尔英智眼科医院行白内障超声乳化吸除联合IOL植入术的近视眼角膜屈光手术后白内障患者20例(23眼),...目的评估Sirius光线追踪法测算角膜屈光术后人工晶状体(IOL)度数的准确性。设计比较性病例系列。研究对象2015年6月至2017年12月在北京爱尔英智眼科医院行白内障超声乳化吸除联合IOL植入术的近视眼角膜屈光手术后白内障患者20例(23眼),其中LASIK术后21眼,PRK术后2眼。方法在白内障术前用IOL Master测量眼轴长度、角膜曲率和前房深度,三维角膜地形图Sirius测量角膜屈光力、前房深度、房角宽度等眼前节数据;用Haigis-L公式、Barrett True K No History公式和Sirius光线追踪法分别计算出使白内障术后屈光度为零的IOL度数;取三种公式结果的平均值作为平均值法的结果。以Haigis-L公式为基础结合Barrett True K No History公式和Siruis光线追踪法的结果进行适当调整来选择实际植入的IOL度数。由同一术者完成白内障超声乳化吸除联合后房型IOL植入术。术后1个月采用主觉验光确定术后实际屈光度。计算四种方法的预测误差(术后实际的屈光不正度数和公式预测的屈光不正度数的差值)、绝对预测误差(预测误差的绝对值)、绝对预测误差分布(绝对预测误差在0.50 D内的百分比和绝对预测误差在1.0 D以内的百分比)。比较四种方法的绝对预测误差、绝对预测误差分布。主要指标预测误差、绝对预测误差、绝对预测误差分布。结果 Sirius光线追踪法、Haigis-L公式、Barrett True K No History公式以及平均值法的预测误差分别为(+0.22±0.57)D、(-0.07±0.73)D、(-0.18±0.81)D、(-0.00±0.57)D,绝对预测误差分别为(0.47±0.38)D、(0.57±0.44)D、(0.64±0.52)D、(0.44±0.34)D。平均值法的绝对预测误差的平均值最小,但各种方法的绝对预测误差之间比较差异无统计学意义(P=0.364)。四种方法绝对预测误差≤0.50 D的分别为16眼(69.57%)、11眼(47.83%)、12眼(52.17%)、14眼(60.87%),差异无统计学意义(P=0.453);绝对预测误差≤1.0 D的分别为21眼(展开更多
基金the Medical and Health Science and Technology Program of Zhejiang Province(2019KY111)Foundation of Wenzhou City Science&Technology Bureau(Y2020037)+1 种基金EYE&ENT Hospital of Fudan University High-level Talents Program(2021318)Clinical Research Plan of SHDC(SHDC2020CR1043B)。
文摘Background:To evaluate the precision of corneal higher-order aberrations measurements after small incision lenticule extraction(SMILE)using the Sirius Scheimpfug-Placido topographer(CSO,Italy).Methods:Seventy-fve eyes from 75 postoperative subjects were included in this prospective study.Three consecutive corneal aberrometric measurements were obtained with the Scheimpfug-Placido topographer by two experienced operators to assess intra-and inter-observer reproducibility.The within-subject standard deviation(Sw),test-retest repeatability(TRT)and the intraclass correlation coefcient(ICC)were calculated.Results:For intraobserver repeatability of anterior and total corneal aberrations,all ICCs were more than 0.922,except for trefoil(0.722 to 0.768).The ICCs of total root mean square(RMS),coma Z(3,±1),and spherical aberration Z(4,0)were over 0.810 while higher-order RMS,trefoil Z(3,±3),and astigmatism II Z(4,±2)were below 0.634 for posterior corneal surface aberrations.All Sw values for all types of aberrations were equal to or below 0.07μm.Regarding interobserver reproducibility,all TRT values were no more than 0.12μm,0.05μm,and 0.11μm for anterior,posterior,and total corneal aberrations,respectively.The ICC values ranged from 0.875 to 0.989,from 0.686 to 0.976 and over 0.834 for anterior,posterior,and total corneal aberrations,respectively.Conclusions:The repeatability of measurements of anterior and total corneal aberrations with the Sirius system in corneas after SMILE surgery was high,except for trefoil.There was some variability in posterior corneal aberrometric measurements.High reproducibility of corneal aberrometric measurements was observed between measurements of both examiners,except for trefoil,with poor to moderate reproducibility.
文摘目的评估Sirius光线追踪法测算角膜屈光术后人工晶状体(IOL)度数的准确性。设计比较性病例系列。研究对象2015年6月至2017年12月在北京爱尔英智眼科医院行白内障超声乳化吸除联合IOL植入术的近视眼角膜屈光手术后白内障患者20例(23眼),其中LASIK术后21眼,PRK术后2眼。方法在白内障术前用IOL Master测量眼轴长度、角膜曲率和前房深度,三维角膜地形图Sirius测量角膜屈光力、前房深度、房角宽度等眼前节数据;用Haigis-L公式、Barrett True K No History公式和Sirius光线追踪法分别计算出使白内障术后屈光度为零的IOL度数;取三种公式结果的平均值作为平均值法的结果。以Haigis-L公式为基础结合Barrett True K No History公式和Siruis光线追踪法的结果进行适当调整来选择实际植入的IOL度数。由同一术者完成白内障超声乳化吸除联合后房型IOL植入术。术后1个月采用主觉验光确定术后实际屈光度。计算四种方法的预测误差(术后实际的屈光不正度数和公式预测的屈光不正度数的差值)、绝对预测误差(预测误差的绝对值)、绝对预测误差分布(绝对预测误差在0.50 D内的百分比和绝对预测误差在1.0 D以内的百分比)。比较四种方法的绝对预测误差、绝对预测误差分布。主要指标预测误差、绝对预测误差、绝对预测误差分布。结果 Sirius光线追踪法、Haigis-L公式、Barrett True K No History公式以及平均值法的预测误差分别为(+0.22±0.57)D、(-0.07±0.73)D、(-0.18±0.81)D、(-0.00±0.57)D,绝对预测误差分别为(0.47±0.38)D、(0.57±0.44)D、(0.64±0.52)D、(0.44±0.34)D。平均值法的绝对预测误差的平均值最小,但各种方法的绝对预测误差之间比较差异无统计学意义(P=0.364)。四种方法绝对预测误差≤0.50 D的分别为16眼(69.57%)、11眼(47.83%)、12眼(52.17%)、14眼(60.87%),差异无统计学意义(P=0.453);绝对预测误差≤1.0 D的分别为21眼(
