Liu Chun-Fu, Sun Chi-Chin, Lin Yun-Hsuan, Peng Shu-Yen, Yeung Ling
Department of Ophthalmology, Keelung Chang Gung Memorial Hospital, No.222, Maijin Rd., Keelung City, 204, Taiwan.
College of Medicine, Chang Gung University, No.259, Wenhua 1st Rd., Guishan Dist., Taoyuan City, 333, Taiwan.
Am J Ophthalmol Case Rep. 2019 Jun 13;15:100495. doi: 10.1016/j.ajoc.2019.100495. eCollection 2019 Sep.
To report a challenging intraocular lens (IOL) power calculation case who received both radial keratotomy (RK) and laser-assisted in situ keratomileusis (LASIK).
A 51-year-old man had received refractive surgery with RK and later enhanced by LASIK more than 20 years ago. He developed severe cataract in left eye with best-corrected visual acuity of 20/100. The IOL power calculation was made using several methods available at the American Society of Cataract and Refractive Surgery (ASCRS) online calculator, including IOL calculation formulas for post-LASIK condition (Shammas, Haigis-L, Barrett True K no history, and Potvin-Hill Pentacam) and formulas for post-RK condition (Double K-modified Holladay 1 based on Oculus Pentacam and IOL Master, and Barrett True K). Haigis-L, Shammas and Barrett true K no history were found to be most accurate in predicting IOL power.
Haigis-L, Shammas and Barrett true K no history are reliable formulas for IOL power calculation in patients who received both RK and LASIK.
报告一例接受了放射状角膜切开术（RK）和准分子激光原位角膜磨镶术（LASIK）的具有挑战性的人工晶状体（IOL）度数计算病例。
一名51岁男性在20多年前接受了RK屈光手术，后来又接受了LASIK增效手术。他左眼出现严重白内障，最佳矫正视力为20/100。使用美国白内障与屈光手术学会（ASCRS）在线计算器上可用的几种方法进行IOL度数计算，包括用于LASIK术后情况的IOL计算公式（Shammas、Haigis-L、无既往史的Barrett True K以及Potvin-Hill Pentacam）和用于RK术后情况的公式（基于Oculus Pentacam和IOL Master的双K修正Holladay 1以及Barrett True K）。发现Haigis-L、Shammas和无既往史的Barrett True K在预测IOL度数方面最为准确。
对于同时接受了RK和LASIK的患者，Haigis-L、Shammas和无既往史的Barrett True K是可靠的IOL度数计算公式。
