Estimation of true corneal power after keratorefractive surgery in eyes requiring cataract surgery: BESSt formula
Estimation of true corneal power after keratorefractive surgery in eyes requiring cataract surgery: BESSt formula
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DOI：
10.1016/j.jcrs.2006.08.037
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发表时间：
2006-12-01
影响因子：
2.8
通讯作者：
Smith, Guy T.
中科院分区：
文献类型：
--
作者：
Borasio, Edmondo;Stevens, Julian;Smith, Guy T.
目的：描述一种新的公式，BESSt，用于评估需要进行白内障手术的眼的角膜屈光性手术后的真实角膜屈光度。该公式考虑了前、后角膜半径和角膜厚度(五角形、眼球)，不需要屈光手术前的信息。结果：在白内障超声乳化术中，用BESSt公式计算的目标屈光度与术后明显屈光度(平均偏差0.08度数[D]+/-0.62[SD])的差异有统计学意义：历史法(-0.07+/-1.92 D；P=0.05)；历史法(0.13+/-2.39 D；P=0.05)；用隐形眼镜方法估计K值的Holladay 2(-0.76+/-1.36D；P=.03)；来自Atlas Toptoper(Humphrey)的K值的Holladay 2(-0.55+/-0.61D；P
PURPOSE: To describe a new formula, BESSt, to estimate true corneal power after keratorefractive surgery in eyes requiring cataract surgery.SETTING: Moorfields Eye Hospital, London, United Kingdom.METHODS: The BESSt formula, based on the Gaussian optics formula, was developed using data from 143 eyes that had kerato refractive surgery. The formula takes into account anterior and posterior corneal radii and pachymetry (Pentacam, Oculus) and does not require pre-keratorefractive surgery information. A software program was developed (BESSt Corneal Power Calculator), and corneal power was calculated in 13 eyes that had keratorefractive surgery and required cataract surgery.RESULTS: In the eyes having phacoemulsification, target refractions calculated with the BESSt formula were statistically significantly closer to the postoperative manifest refraction (mean deviation 0.08 diopters [D] +/- 0.62 [SD]) than those calculated with other methods as follows: history technique (-0.07 +/- 1.92 D; P = .05); history technique with clouble-K adjustment (0.13 +/- 2.39 D; P =.05); Holladay 2 with K-values estimated with the contact lens method (-0.76 +/- 1.36 D; P = .03); Holladay 2 with K-values from Atlas topographer (Humphrey) (-0.55 +/- 0.61 D; P