重复性
圆锥角膜
眼科
彗差(光学)
角膜曲率计
组内相关
医学
泽尼克多项式
角膜地形图
验光服务
角膜
数学
光学
波前
物理
临床心理学
心理测量学
统计
作者
Perla Ibrahim,Jad F. Assaf,R.A. Bejjani,Julien Torbey,Madeleine Yehia,Saleh Bahir Al-Ulloom,Shady T. Awwad
出处
期刊:Journal of Cataract and Refractive Surgery
[Ovid Technologies (Wolters Kluwer)]
日期:2024-03-14
标识
DOI:10.1097/j.jcrs.0000000000001443
摘要
To evaluate the intrasubject repeatability of pyramidal aberrometer measurements in a sample of keratoconus and normal eyes.American University of Beirut Medical Center, Beirut, Lebanon.Prospective comparative repeatability analysis.Keratoconus and Normal eyes from adult patients.Each eye was evaluated with 3 consecutive acquisitions using a pyramidal aberrometer.The repeatability of different ocular Higher Order and Lower Order Aberrations (HOAs and LOAs, respectively), and Zernike coefficients down to the fifth order, was evaluated. Repeatability was assessed by within-subject standard deviations (Sw), repeatability limits (r), and intraclass correlation coefficients (ICC), among other parameters.72 keratoconus patients (72 eyes), and 76 normal patients (76 eyes) were included. In normal and keratoconus eyes, the ICC of total LOA and HOAs, as well as each of the Zernike coefficients, was >0.9. The Sw for keratoconus eyes with mean maximal keratometry (Kmax)<50D was 0.1345 for total LOAs, 0.0619 for total HOAs, 0.0292 for horizontal coma, 0.0561 for vertical coma, and 0.0221 for spherical aberration as compared to 0.2696, 0.1486, 0.0972, 0.1497 and 0.0757 for Keratoconus eyes with Kmax>=50D. Similar trend of better repeatability for grade 1 keratoconus and HOA<2D as compared to grade 2 and 3 keratoconus and eyes with HOA>2D were also noted.Ocular aberrometer measurements generated by high definition pyramidal aberrometers have high repeatability in both normal and mild keratoconus eyes; and moderate repeatability, yet still clinically acceptable, in advanced keratoconus. This is of particular importance in ocular wavefront-guided treatments.
科研通智能强力驱动
Strongly Powered by AbleSci AI