Refractive Outcomes Of Intraocular Lens Power Implantation After Radial Keratotomy And Lasik - A Case Series

 To assess the refractive outcome of three complex cases involving the calculation of intraocular lens (IOL) power, individuals who underwent both radial keratotomy (RK) and laser-assisted in situ keratomileusis (LASIK) were included in the study.

The IOL power calculation in this study incorporated multiple methods for different conditions. Specifically, for post-LASIK conditions, the calculation included IOL calculation formulas such as Shammas, Haigis-L, Barrett True K (without historical data), and Potvin-Hill Pentacam. For post-RK conditions, the calculation employed formulas such as Double K-modified Holladay 1 (based on Oculus Pentacam and AL scan) and Barrett True K.

A total of three eyes from two patients, who had previously undergone radial keratotomy (RK) followed by LASIK more than 10 years ago, underwent phacoemulsification and intraocular lens (IOL) implantation. The average postoperative refractive spherical equivalent was -0.5 D (ranging from +0.5 D to -1.5 D), with a mean astigmatism of -1.0 D (ranging from -1.50 D to 0.00 D). All eyes achieved uncorrected visual acuity (UCVA) of logMAR 0.2. Among the different methods used to predict IOL power, Barrett True K (without historical data) and Haigis-L were found to be the most accurate.

The Barrett True K formula (without historical data) and the Haigis-L formula have proven to be reliable methods for accurately calculating the intraocular lens (IOL) power in patients who received both RK and LASIK.