准分子激光屈光手术后眼内人工晶状体度数计算的新中央-周边角膜曲率法。
A new central-peripheral corneal curvature method for intraocular lens power calculation after excimer laser refractive surgery.
机构信息
Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.
出版信息
Acta Ophthalmol. 2013 Mar;91(2):e133-9. doi: 10.1111/aos.12007. Epub 2013 Jan 7.
PURPOSE
To propose the central-peripheral (C-P) method, which requires no data history to calculate intraocular lens (IOL) powers for eyes that underwent laser in situ keratomileusis (LASIK), and compare the accuracy of the C-P method with other IOL formulas for eyes after LASIK.
METHODS
Sixteen patients with cataract (25 eyes) who underwent myopic LASIK were analysed retrospectively. The C-P method is a modified double-K method using the SRK/T formula, in which the estimated pre-LASIK keratometric power calculated from the post-LASIK peripheral anterior sagittal power (also called the axial power) is used for the Kpre in the double-K method using the SRK/T formula, and the post-LASIK anterior sagittal power is used for the Kpost. We compared the accuracy of the C-P method with other popular IOL calculation formulas for use in eyes after LASIK.
RESULTS
The median values of the arithmetic and absolute prediction errors with the C-P method were 0.11 diopter (D) (range, -1.67 to 1.97 D) and 0.55 D (range, 0.02-1.97 D), respectively. The prediction error using the C-P method was within ±0.5 D in 48% of eyes, within -1.0 to +0.5 D in 60% of eyes, and within ±1.0 D in 68% of eyes. The C-P method resulted in a significantly higher percentage of eyes within ±0.5 D than the BESSt formula, Shammas-PL formula, true net power method, double-K method using 43.5 D for Kpre, and Feiz-Mannis method.
CONCLUSION
The C-P method may be a good option for calculating IOL powers in eyes undergoing cataract surgery after LASIK when the preoperative LASIK data are unavailable.
目的
提出中央-周边（C-P）方法，该方法在没有激光原位角膜磨镶术（LASIK）术前数据的情况下计算人工晶状体（IOL）度数，并比较 C-P 方法与其他 LASIK 术后 IOL 公式的准确性。
方法
回顾性分析了 16 例（25 只眼）接受近视 LASIK 治疗的白内障患者。C-P 方法是一种改良的双 K 法，使用 SRK/T 公式，其中从术后周边前矢状力（也称为轴向力）估计的术前 LASIK 角膜曲率力用于 SRK/T 公式中的双 K 法中的 Kpre，而术后前矢状力用于 Kpost。我们比较了 C-P 方法与其他用于 LASIK 术后的流行 IOL 计算公式的准确性。
结果
C-P 方法的算术和绝对预测误差的中位数分别为 0.11 屈光度（D）（范围，-1.67 至 1.97 D）和 0.55 D（范围，0.02-1.97 D）。使用 C-P 方法，48%的眼预测误差在±0.5 D 以内，60%的眼在-1.0 至+0.5 D 以内，68%的眼在±1.0 D 以内。C-P 方法的结果是，±0.5 D 以内的眼的比例明显高于 BESSt 公式、Shammas-PL 公式、真实净力法、Kpre 使用 43.5 D 的双 K 法和 Feiz-Mannis 法。
结论
在没有术前 LASIK 数据的情况下，C-P 方法可能是计算 LASIK 术后白内障手术中 IOL 度数的一种较好的选择。
Zotero 插件