ESCRS - PP21.17 - The Study Of Posterior Conrneal Elevation After Lasek For Mild- Moderate Myopia With Inferior Steeper Conrea：A Long-Term Observation

The Study Of Posterior Conrneal Elevation After Lasek For Mild- Moderate Myopia With Inferior Steeper Conrea：A Long-Term Observation

Published 2025 - 43rd Congress of the ESCRS

Reference: PP21.17 | Type: Free paper | DOI: 10.82333/fzmb-nz20

Authors: Michael Mimouni 1 , Waseem Nasser 2 , Adir Sommer* 2 , Dror Ben Ephraim 2 , Eyal Cohen 3 , Igor Kaiserman 3 , Tzahi Sela 3 , Gur Munzer 3 , Margarita Safir 3

1Rambam Health Care Campus,Haifa,Israel;Care Vision Laser Centers,Haifa,Israel, 2Rambam Health Care Campus,Haifa,Israel;Care Vision Laser Centers,Tel Aviv,Israel, 3Care Vision Laser Centers,Tel Aviv,Israel

Purpose

This study aimed to investigate the stability of posterior corneal surface 2 years after laser-assisted subepithelial keratomileusis (LASEK) in mild- moderate myopia patients with inferior steeper conrea.

Setting

 prospective comparative study

Methods

In this prospective comparative study，thirty-two eyes with inferior steeper conreas, I-S≥1D underwent LASEK were enrolled as Group A. Fourteen eyes of LASEK patients with symmetrical corneal curvature were enrolled as Group B. All patients were followed up for 2 years. Pentacam was used to measure the posterior corneal elevation at the central point, thinnest point, and posterior maximum elevation (PME) and the mean posterior elevation in the central 2-mm area (MPE-2 mm), 4-mm area, and 6-mm area at the 2-year follow-up.

Results

In both groups, for central region, posterior elevation decreased implying backward displacement; for peripheral region, it increased indicating forward trend. There was no significant difference in changes in all determined parameters between the two groups (P≥0.07).

Moreover, no significant correlation was noted between posterior elevation changes and spherical equivalent (SE), ablation depth (AD), residual bed thickness (RBT), I-S, or percent tissue altered (PTA ).

Conclusions

The results of this study suggest that the posterior corneal surface remain stable within 2 years after LASEK for inferior steeper conrea. The changes of posterior elevation had no correlation to the preoperative parameters.