Repeatability of topographic and aberrometric measurements at different accommodative states using a combined topographer and open-view aberrometer
Repeatability of topographic and aberrometric measurements at different accommodative states using a combined topographer and open-view aberrometer
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DOI：
10.1016/j.jcrs.2014.07.037
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发表时间：
2015-04-01
影响因子：
2.8
通讯作者：
Kohnen, Thomas
中科院分区：
文献类型：
--
作者：
Gabriel, Claudia;Klaproth, Oliver Klaus;Kohnen, Thomas
目的：评价联合像差仪(iTRACE视觉功能分析仪)对5种调节刺激的角膜第一表面像差和像差测量的重复性。设置：德国法兰克福歌德大学眼科。设计：前瞻性病例系列。方法：对中低度近视或远视的年轻人进行2个测量系列，包括3个角膜地形图测量和聚焦于5个距离(0.4，0.5，0.6，1.0和4.0m)目标的波前测量。用6次测量的标准差(SD)和Bland-Altman分析2个测量系列的平均值的重复性系数(COR)进行重复性分析。结果：共评价50只眼(50例)。用像差计函数计算的5个靶距的最低平均SD/COR分别为：总眼像差均方根值0.07微米/0.14微米，低阶像差0.07微米/0.16微米，高阶像差0.03微米/0.66微米，球镜0.10度/0.22微米，柱面0.08微米/0.13微米，等效球镜0.09微米/0.21微米。总RMS、LOAS RMS、SPHERE和SE测量的重复性随着目标距离的增加而提高(像差值P<；.01；屈光值P<；0.03)。使用角膜地形图仪测量的重复性显示，总RMS的平均SDS/CORS为0.19微米/0.41微米，LOAS RMS为0.19微米/0.39微米，HOAS RMS为0.08微米/0.23微米。结论：该像差仪具有满意的测量重复性，但随着调节努力的增加，重复性逐渐降低。(C)2015年《亚洲人权报告》和《经济、社会和文化权利报告》
PURPOSE: To evaluate the repeatability of corneal first-surface aberrations and aberrometric measurements of a combined aberrometer topographer (iTrace Visual Function Analyzer) for 5 accommodative stimuli.SETTING: Department of Ophthalmology, Goethe-University, Frankfurt, Germany.DESIGN: Prospective case series.METHODS: Eyes of young adults with low to moderate myopia or hyperopia were examined in 2 measurement series comprising 3 corneal topography measurements and wavefront measurements focusing on targets at 5 distances (0.4, 0.5, 0.6, 1.0, and 4.0 m). Repeatability was analyzed using the standard deviation (SD) within 6 measurements and the coefficient of repeatability (CoR) by Bland-Altman analysis of the means of the 2 measurement series.RESULTS: Fifty eyes (50 subjects) were evaluated. The lowest calculated mean SD/CoR measurements using the aberrometer function at 5 target distances were 0.07 mu m/0.14 mu m for total ocular aberrations root mean square (RMS), 0.07 mu m/0.16 mu m for lower-order aberrations (LOAs) RMS, 0.03 mu m/0.66 mu m for higher-order aberrations (HOAs) RMS, 0.10 diopter (D)/0.22 D for sphere, 0.08 D/0.13 D for cylinder, and 0.09 D/0.21 D for the spherical equivalent (SE). Repeatability of the total RMS, LOAs RMS, sphere, and SE measurements improved with increasing target distance (P < .01 for aberrometric values; P < .03 for refractive values). Measurement reproducibility using the corneal topographer showed mean SDs/CoRs of 0.19 mu m/0.41 mu m for total RMS, 0.19 mu m/0.39 mu m for LOAs RMS, and 0.08 mu m/0.23 mu m for HOAs RMS.CONCLUSION: The aberrometer showed satisfactory results for measurement repeatability at all target distances and declining repeatability with increasing accommodation effort. (C) 2015 ASCRS and ESCRS