ESCRS - PP06.16 - Custom-Q Versus Wavefront-Optimized Laser In Situ Keratomileusis (Lasik) For Myopia And Myopic Astigmatism: A Retrospective Case Series

Custom-Q Versus Wavefront-Optimized Laser In Situ Keratomileusis (Lasik) For Myopia And Myopic Astigmatism: A Retrospective Case Series

Published 2022 - 40th Congress of the ESCRS

Reference: PP06.16 | Type: Free paper | DOI: 10.82333/pd44-eq91

Authors: Nuno Miguel Sousa Gouveia* 1 , Raquel Félix 1 , João Gil 1 , Esmeralda Costa 1 , Andreia Rosa 2 , Cristina Tavares 1 , Maria João Quadrado 2 , Joaquim Murta 2

1Ophthalmology,Centro Hospitalar e Universitário de Coimbra,Coimbra,Portugal, 2Ophthalmology,Centro Hospitalar e Universitário de Coimbra,Coimbra,Portugal;Faculdade de Medicina,Universidade de Coimbra,Coimbra,Portugal

Purpose

With standard myopic ablations in LASIK there is a deterioration in vision quality, mostly in mesopic and low-contrast conditions, that can be attributed to changes in corneal asphericity. Several new aspheric ablation profiles, such as custom-Q and wavefront-optimized (WFO), have been developed to address this issue by compensating the spherical aberration induced. The aim of this study is to report and compare visual function outcomes, namely corrected distance visual acuity (CDVA) and spherical equivalent (SE), between custom-Q and wavefront-optimized LASIK for correction of myopia and myopic astigmatism.

Setting

Ophthalmology Department, Centro Hospitalar e Universitário de Coimbra, Portugal

Methods

This retrospective case series included 62 eyes from 53 patients who underwent LASIK for correction of myopia or myopic astigmatism from 2020 to 2021. The sample was further divided into two groups according to the customized ablation profile used: 49 eyes were treated with custom-Q and 12 eyes with WFO. We included patients older than 20 years, with a minimum follow-up of 6 months, stable refractive error for 2 years and SE inferior to 7.50 diopters (D). Eyes with other ophthalmological pathologies were excluded. The CDVA (logMAR) and SE were evaluated preoperatively and re-evaluated 3 to 6 months postoperatively. Furthermore, asphericity and optical aberration were obtained using Scheimpflug imaging.

Results

The preoperative data was similar between groups. Baseline median CDVA was 0 (0-0.1) in both groups and mean SE was -5.27±1.47D in the custom-Q group and -4.96±1.82D in the WFO group (p=0.55). The preoperative Q-value and higher order aberration (HOA) in the custom-Q group was -0.20±0.09 and 0.42±0.12μm, respectively, and in the WFO group -0.22±0.12 and 0.43±0.10μm, respectively. There was no difference in median postoperative CDVA between the custom-Q and WFO groups, which remained 0 (0-0.1). Moreover, no statistically significant difference was found in postoperative SE between the custom-Q group -0.29±0.55D and the WFO group -0.58±0.63D (p=0.12).

Conclusions

In our sample, LASIK custom-Q ablation profile yielded postoperative results regarding CDVA and SE comparable to those of the wavefront-optimized ablation profile for correction of myopia and myopic astigmatism.