Resumen de Six-month clinical outcomes in LASIK for high myopia with aspheric «aberration neutral» ablations using the AMARIS laser system
María Clara Arbelaez, Camila Vidal, Samuel Arba Mosquera
PURPOSE: To evaluate the postoperative clinical outcomes and high order aberrations among eyes with myopia higher than 5 D that have underwent LASIK treatments using the Schwind AMARIS laser system. Schwind CAM Aberration-Free Aspheric treatments have been performed in all cases.
PATIENTS AND METHODS: LASIK treatments were performed on 75 eyes (45 patients) with mean spherical equivalent -6.46±1.15 D (range, -8.50 to -5.25 D) using a SCHWIND Pendular microkeratome with a 110 µm cutting head and the SCHWIND AMARIS excimer laser. In all cases pre- and postoperative autorefractor measurements, manifest refraction, best spectacle-corrected visual acuity (BSCVA), uncorrected visual acuity (UCVA), topography and corneal wavefront analysis using the Optikon Keratron Scout, and ocular wavefront analysis using the SCHWIND Ocular Wavefront Analyzer as well as complications, were performed. Ablations were calculated using the ORK-CAM software.
Clinical outcomes were evaluated in terms of efficacy, predictability, stability, refractive outcome, safety, and wavefront aberrations.
RESULTS: At six months, mean spherical equivalent manifest refraction was -0.30±0.34 D (range, -1.12 to +0.38 D). Eighty-one percent eyes (61) were within ±0.50 D of attempted correction. Uncorrected visual acuity was 20/20 or better in 81% (61 eyes), and 20/32 or better in 97% (73 eyes). Average root-mean-square of the high order aberrations (RMSHOA) increased 0.14 µm after the treatment, mean spherical aberration increased 0.12 µm after the treatment, and mean coma increased 0.04 µm after the treatment (all for 6.0 mm analysis diameter).
CONCLUSIONS: Our results show that non-customised «aberration neutral» ablation profiles derived from wavefront analysis are able to minimize the amount of induced aberrations even for myopic refractive corrections up to -9 D.
