OBJECTIVE To determine whether procedure room temperature or humidity during LASIK affect refractive outcomes in a large patient sample. DESIGN Retrospective cohort study. PARTICIPANTS A total of 202 394 eyes of 105 712 patients aged 18 to 75 years who underwent LASIK at an Optical Express, Inc., location in their United Kingdom and Ireland centers from January 1, 2008, to June 30, 2011, wh...

PURPOSE The aims of our study were to investigate whether laser in situ keratomileusis (LASIK) improves health-related quality of life (HRQoL) and to identify factors that affect postoperative HRQoL. MATERIALS AND METHODS A total of 213 Japanese patients who underwent primary LASIK were analyzed in this study. The average age of patients was 35.0±9.4 years. The subjects were asked to answer q...

PURPOSE To compare refractive outcome, subepithelial haze, and pain after epithelial laser in situ keratomileusis (epi-LASIK) and photorefractive keratectomy (PRK). METHODS In this prospective, randomized study, 32 eyes of 16 patients were treated for myopia with epi-LASIK (epi-LASIK group) in one eye and PRK in the fellow eye (PRK group). All patients underwent ablation using the NIDEK EC-50...

PURPOSE To compare the safety and efficacy of wavefront-guided laser in situ keratomileusis (LASIK) vs photorefractive keratectomy (PRK) in a prospective randomized clinical trial. METHODS A cohort of 68 eyes of 34 patients with -0.75 to -8.13 diopters (D) of myopia (spherical equivalent) were randomized to receive either wavefront-guided PRK or LASIK in the fellow eye using the VISX CustomVu...

Purpose The purpose of this study was to determine the effect of flap thickness on corneal biomechanics after myopic laser in situ keratomileusis (LASIK). Methods This is a prospective controlled non-randomized, institutional study. Patients underwent either epi-LASIK with mitomycin (advanced surface ablation [ASA]), thin-flap LASIK (90 µm head), or thick-flap LASIK (130 µm head). In ASA, the...

PURPOSE To use a double-pass system to compare the optical quality after photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) for mild to moderate myopia. SETTING Universitat Politècnica de Catalunya, Terrassa, Barcelona Institute of Ocular Microsurgery, Barcelona, Spain. DESIGN Comparative case series. METHODS Optical quality was assessed with a clinical double-pass...

PURPOSE A prospective study was conducted to compare the effectiveness, safety, and stability of photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) for correction of low to moderate myopia. METHODS Forty-five patients with a manifest refraction (PRK, -4.54 +/- 0.80; LASIK, -4.82 +/- 1.10) from -1.50 to -6.00 diopters (D) were treated and followed-up for 6 months. In ea...

purpose : to compare the visual and refractive outcomes of laser in situ keratomileusis (lasik) versus laser assisted subepithelial keratectomy (lasek) in the treatment of low to moderate myopia and astigmatism methods : a retrospective comparative case series study comprised 2,474 eyes of patients with manifest refraction spherical component lower than -5.00 diopters (d) and cylinder component...

PURPOSE: To evaluate the safety and efficacy of laser in situ keratomileusis (LASIK) compared to photorefractive keratectomy (PRK) for the correction of low or moderate myopia (-0.50 to-6.00 D) at 6 months after surgery. refractive outcomes of LASIK and PRK were similar. Although flap related complications occurred only after LASIK, the overall risk of loss of best spectacle-corrected visual ac...

A central island is defined as a localized elevated area in corneal topography after excimer laser application for myopic correction. We experienced 15 cases of central islands developed 1 week after LASIK using VISX STAR on corneal topography. The uncorrected visual acuity and best corrected visual acuity were 0.52 +/- 0.22, 0.66 +/- 0.25 in central islands group and 0.69 +/- 0.19, 0.78 +/- 0....