Cirugía refractiva corneal por queratomileusis in situ asistida por láser de excímeros

Introduction: refractive surgery is a sub-specialty which is comprised of all surgical procedures in order to modify the ocular refraction in different ametropias: astigmatism, myopia, hypermetropia and presbyopia. This treatment is performed using excimer Laser. Objective: to describe the main results using Laser-Assisted in Situ Keratomileusis (LASIK). Material and Method: an observational, descriptive, retrospective and cross-sectional study was conducted taking 56 operated patients as a sample (106 eyes) using the LASIK technique, considering the established criteria to be included. The surgical procedure was performed with the Excimer Laser ESIRIS of the SCHWIND, with optical zones from 6.00 to 6.50mm, automatic pendulous microkeratome of Carriazo with a programming of the flap of 160 µm, diameter of the spot of 0,8 mm, Gaussian ablation profile, repetition rate of 200hz, active eye tracking of high speed (328hz), a distance of work of 29,5cm were taken into account. Results: female sex prevailed and ages between 20 and 29. The most frequent refractive defect treated was composed-myopic astigmatism. Preoperative pachymetries exceeded the 500 microns in all cases. Conclusions: visual acuity without preoperative correction was inferior to 0.5 in all cases, achieving the highest visual acuity without postoperative correction in the majority of patients.