From the Centro de Oftalmología Barraquer, Barcelona, Spain (Fernández-Rosés, Lamarca, Beltrán, Barraquer); Institut Universitari Barraquer, Universitat Autònoma de Barcelona, Barcelona, Spain (Fernández-Rosés, Lamarca, Beltrán, Barraquer); Universitat Internacional de Catalunya, Barcelona, Spain (Lamarca, Barraquer); Stein Eye Institute, University of California, Los Angeles, Los Angeles, California (Hoffer); St. Mary's Eye Center, Santa Monica, California (Hoffer); IRCCS-G.B. Bietti Foundation, Rome, Italy (Savini).
J Cataract Refract Surg. 2022 Jan 1;48(1):32-36. doi: 10.1097/j.jcrs.0000000000000709.
To compare the accuracy of the equivalent keratometry reading (EKR) from a color LED corneal topographer (Cassini) with that of other no-history formulas for intraocular lens (IOL) power calculation in eyes with previous myopic excimer laser surgery.
Centro de Oftalmología Barraquer, Barcelona, Spain.
Retrospective case series.
The refractive outcomes of the Cassini EKR entered into the Haigis formula were compared with those of the Barrett True-K, Haigis-L, and Shammas-PL formulas and the Triple-S method combined with the Haigis formula. Optimized lens constants for virgin eyes were used. The mean prediction error (PE), the median absolute error (MedAE), and the percentage of eyes with a PE within ±0.25 diopter (D), ±0.50 D, ±0.75 D, and ±1.00 D were calculated.
The study comprised 37 patients (37 eyes). The Haigis-L, Shammas-PL, and Barrett True-K no-history methods produced a myopic mean PE that was significantly different from zero (P < .001, P < .001 and P = .004, respectively), whereas the mean PEs of Cassini EKR and the Triple-S combined with the Haigis formula were not different from zero (P > .05). Repeated-measures analysis of variance disclosed a significant difference among the PE of all methods (P < .0001). The MedAE of the Cassini EKR, Barrett True-K, Haigis-L, Shammas-PL, and Triple-S was, respectively, 0.34 D, 0.34 D, 0.49 D, 0.48 D, and 0.31 D (P = .0026).
The performance of the combination of standard Haigis formula with Cassini EKR was comparable to other no-history formulas in eyes with previous myopic excimer laser surgery.
比较色 LED 角膜地形图（Cassini）等效角膜曲率读数（EKR）与既往近视准分子激光手术眼其他无历史公式的内眼人工晶状体（IOL）计算的准确性。
西班牙巴塞罗那 Barraquer 眼科中心。
回顾性病例系列。
将 Cassini EKR 的屈光结果输入到 Haigis 公式中，并与 Barrett True-K、Haigis-L 和 Shammas-PL 公式以及 Triple-S 方法与 Haigis 公式相结合进行比较。使用 virgin 眼的优化镜片常数。计算平均预测误差（PE）、中位数绝对误差（MedAE）以及预测误差在±0.25 屈光度（D）、±0.50 D、±0.75 D 和±1.00 D 范围内的眼数百分比。
该研究共纳入 37 名患者（37 只眼）。Haigis-L、Shammas-PL 和 Barrett True-K 无历史方法的平均近视 PE 与零显著不同（P<0.001、P<0.001 和 P=0.004），而 Cassini EKR 和 Triple-S 与 Haigis 公式的平均 PE 与零无显著差异（P>0.05）。重复测量方差分析显示，所有方法的 PE 之间存在显著差异（P<0.0001）。Cassini EKR、Barrett True-K、Haigis-L、Shammas-PL 和 Triple-S 的 MedAE 分别为 0.34 D、0.34 D、0.49 D、0.48 D 和 0.31 D（P=0.0026）。
标准 Haigis 公式与 Cassini EKR 相结合的性能在既往近视准分子激光手术后的眼中与其他无历史公式相当。
