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新的人工晶状体度数公式(VRF)的发展和临床准确性,并与其他公式比较

Voytsekhivskyy, O.V.

期刊名称:American journal of ophthalmology

卷期:2018年第185卷

摘要

摘要:目的:旨在通过已知的方法研究并比较VRF人工晶状体(IOL)度数计算公式的准确性和可重复性。设计:发展和验证研究。方法:本次分析包括在基辅眼科乌克兰基辅医院眼科显微手术中心由1位外科医生进行手术,使用3种不同类型的疏水性镜片:IQ SN60WF494只眼)和ReSTOR SN6AD1169只眼)(Alcon Labs, Fort Worth, Texas)和AMO Tecnis MF ZMB00160只眼)(美国J&J Vision, Santa Ana, California)的823例患者的823只眼。完整的数据集分为2个子集,第一个研发新公式,第二个用其他最常用的现代人工晶状体度数计算方法评估其性能(HaigisHoffer QHolladay 1Holladay 2SRK / T ,和T2)。 VRF算法是一种经验性算法;使用4个预测因子来估计术后晶状体位置,包括轴长,角膜屈光力(K),术前前房深度(角膜上皮到晶状体)和水平角膜直径。结果还分为短(≤22mm),中(> 22<24.5mm),中长(≥24.5<26mm)和长(≥26mm)轴长组。结果:平均误差,对所有7个方法的中位绝对误差和平均绝对误差进行了评估。 VRF公式在整个轴向长度范围内具有最低的绝对误差中位数(0.305屈光度[D]),并与T20.321D)和Holladay 10.326D)公式相当。结论:新公式与已知的方法相当,在整个轴向长度范围内都更好。

PURPOSE:To develop and compare the accuracy and reproducibility of the VRF intraocular lens (IOL) power calculation formula with well-known methods.DESIGN:Development and validation study.METHODS:This analysis comprised 823 eyes of 823 patients at Kiev Clinical Ophthalmology Hospital Eye Microsurgery Center, Kiev, Ukraine, operated on by 1 surgeon with 3 different types of hydrophobic lenses: IQ SN60WF (494 eyes) and ReSTOR SN6AD1 (169 eyes) (Alcon Labs, Fort Worth, Texas, USA) and AMO Tecnis MF ZMB00 (160 eyes) (J&J Vision, Santa Ana, California, USA). The full data set was divided into 2 subsets, the first to develop the new formula and the second to evaluate their performance with other most commonly used modern methods of IOL power calculation (Haigis, Hoffer Q, Holladay 1, Holladay 2, SRK/T, and T2). The VRF algorithm is empirical; it uses 4 predictors for estimation of postoperative lens position, including axial length, corneal power (K), preoperative anterior chamber depth (corneal epithelium to lens), and horizontal corneal diameter. The results are also stratified into groups of short (22 mm), medium (>22 to <24.5 mm), medium-long (24.5 to <26 mm), and long (26 mm) axial length.RESULTS:The mean error, median absolute error, and mean absolute error were evaluated for all 7 methods with 1 IOL type. The VRF formula had the lowest median (0.305 diopter [D]) absolute error over the entire axial length range, and was comparable with the formulas for T2 (0.321 D) and Holladay 1 (0.326 D).CONCLUSION:The new formula was comparable with well-known methods and was better over the entire axial length range.


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