J Refract Surg. 2024 Sep;40(9):e635-e644. doi: 10.3928/1081597X-20240718-01. Epub 2024 Sep 1.
To investigate the impact of back-to-front corneal radius ratio (B/F ratio) and posterior keratometry (PK) on the accuracy of intraocular lens power calculation formulas in eyes after myopic laser in situ keratomileusis (LASIK)/photorefractive keratectomy (PRK) surgery.
A retrospective, consecutive case series study included 101 patients (132 eyes) with cataract after myopic LASIK/PRK. Mean prediction error (PE), mean absolute PE (MAE), median absolute error (MedAE), and the percentage of eyes within ±0.25, ±0.50, and ±1.00 diopters (D) of PE were determined.
The Barrett True K-TK formula exhibited the lowest MAE (0.59 D) and MedAE (0.48 D) and the highest percentage of eyes within ±0.50 D of PE (54.55%) in total. In eyes with a B/F ratio of 0.70 or less and PK of -5.70 D or greater, the Potvin-Hill formula displayed the lowest MAE (0.46 to 0.67 D).
The Barrett True-TK exhibited the highest prediction accuracy in eyes after myopic LASIK/PRK overall. However, for eyes with a low B/F ratio and flat PK, the Potvin-Hill performed best. .
探讨在接受近视激光原位角膜磨镶术（LASIK）/准分子激光角膜切削术（PRK）后的患者中，角膜前后面曲率半径比（B/F 比）和后表面角膜曲率（PK）对眼内人工晶状体屈光力计算公式准确性的影响。
本回顾性连续病例系列研究纳入了 101 例（132 只眼）近视 LASIK/PRK 术后白内障患者。测量平均预测误差（PE）、平均绝对 PE（MAE）、中位数绝对误差（MedAE）以及预测误差在±0.25、±0.50 和±1.00 屈光度（D）范围内的眼数百分比。
在所有患者中，Barrett True-K-TK 公式的 MAE（0.59 D）和 MedAE（0.48 D）最低，预测误差在±0.50 D 范围内的眼数百分比最高（54.55%）。在 B/F 比为 0.70 或更低且 PK 为-5.70 D 或更大的眼中，Potvin-Hill 公式的 MAE（0.46 至 0.67 D）最低。
总体而言，Barrett True-TK 在近视 LASIK/PRK 术后患者中具有最高的预测准确性。然而，对于 B/F 比较低且 PK 较平坦的患者，Potvin-Hill 公式表现最佳。
