Myopia correction with transepithelial photorefractive keratectomy vs microkeratome and femtosecond-assisted laser in situ keratomileusis: two year case-matched analysis

Session Details

Session Title: LASIK I

Session Date/Time: Sunday 23/09/2018 | 14:00-16:00

Paper Time: 14:18

Venue: Room A3, Podium 2

First Author: : M.Arbelaez OMAN

Co Author(s): :    J. Arbelaez   S. Arba Mosquera                 

Abstract Details

Purpose:

To compare visual, refractive, and wavefront aberration outcomes of single-transepithelial photorefractive keratectomy (T-PRK), microkeratome-assisted laser in situ keratomileusis (M-LASIK) and femtosecond-assisted laser in situ keratomileusis (F-LASIK) after excimer laser ablation with an aspheric ablation profile.

Setting:

Muscat Eye Laser Center, Muscat, Sultanate of Oman.

Methods:

A retrospective analysis of 1488 eyes of 1251 patients with myopia up to -10 diopters (D) (220 eyes, T-PRK; 506 eyes M-LASIK with the Carriazo-Pendular microkeratome; and 762 eyes F-LASIK with the Ziemer LDV Z-series) was conducted. Surgery was performed using the SCHWIND AMARIS 1050RS Aberration-Free aspheric ablation profile. The clinical outcomes evaluated were predictability, refractive outcomes, and visual acuity. The Student t test and chi-square test were used for statistical analysis.

Results:

Groups were comparable preoperative except for higher myopia, lower UDVA and thinner pachymetry in T-PRK. From 3m postoperative, all were comparable for uncorrected and corrected distance visual acuity, efficacy index, safety, and refractive predictability, whereas before 1m postoperative T-PRK UDVA was lower compared to M-LASIK and F-LASIK. All demonstrated improved contrast sensitivity. All demonstrated significant change in spherical aberration. The induced spherical aberration was 0.040 µm/D in T-PRK group, 0.031 µm/D in M-LASIK group, and 0.028 µm/D in F-LASIK group. Other higher order aberrations didn't show significant change. The change in higher order aberrations was not significantly different in groups.

Conclusions:

The aspheric ablation profile is safe, effective, and predictable and produces similar visual and refractive results with three different surgical approaches of T-PRK, M-LASIK, and F-LASIK. The ablation profile demonstrated a low induction rate of higher order aberrations regardless of surgical approach. T-PRK outcomes from 3-months postoperatively were equivalent to those of M-LASIK and F-LASIK. T-PRK was efficacious and safe; however, the procedure had a longer recovery time than M-LASIK and F-LASIK.

Financial Disclosure:

... is employed by a for-profit company with an interest in the subject of the presentation, ... travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented