PURPOSE To observe torsional movements of the eye in refractive surgery, and their possible consequences in the surgery outcome. METHODS In a prospective study, 49 eyes of 40 patients were submitted to surgical correction of astigmatism, by the LASIK technique. Patients were divided in two groups based on the cylindric power. Group A from -0.25 to -2.00D; group B from -2.25 to -6.00D. The occ...

PURPOSE To evaluate the trends in corneal refractive procedure selection for the correction of myopia, focusing on the relative proportions of laser in situ keratomileusis (LASIK) and surface ablation procedures. METHODS Only eyes that underwent LASIK or surface ablation for the correction of myopia between 2008-2011 were included in this retrospective study. Additional recorded parameters in...

BACKGROUND The purpose of this study was to evaluate the current recommendations regarding laser refractive surgery in patients with diabetes mellitus and to assess whether these patients make appropriate candidates for laser vision correction. METHODS A literature search was conducted to identify current research on the ocular complications of diabetes and original publications on laser refr...

PURPOSE To evaluate the biomechanical changes occurring after LASIK flap creation and rapid corneal cross-linking (CXL) measured with Brillouin light microscopy. METHODS Porcine eyes (n = 11) were evaluated by Brillouin light microscopy sequentially in the following order: virgin state, after LASIK flap creation, and after rapid CXL. Each eye served as its own control. Depth profile of the Br...

PURPOSE To assess the effects of LASIK with the 15-kHz IntraLase femtosecond laser on corneal endothelium. METHODS In a prospective, single-center clinical trial, 138 patients (mean age: 32.0 ± 7.1 years [range: 21 to 42 years]) underwent femtosecond LASIK for the correction of myopia -0.75 to -9.00 diopters (D) and cylinder up to 3.25 D. Patients were divided into two groups: contact lens gr...

PURPOSE To evaluate and modify the Randleman Ectasia Risk Score System for predicting post-laser in situ keratomileusis (LASIK) ectasia in patients with normal preoperative corneal topography. METHODS In this retrospective study we reviewed data from 136 eyes which had undergone LASIK including 34 ectatic and 102 normal eyes between 1999 and 2009. After determining the sensitivity and specifi...

PURPOSE To compare toric implantable collamer lens (T-ICL), femto-LASIK, and ReLEx SMILE for the treatment of low to moderate myopic astigmatism in terms of long-term visual and refractive outcomes and predictability of astigmatic correction. MATERIALS AND METHODS The study included 30 eyes from 30 patients between the age groups of 21 and 40 years, undergoing bilateral surgery with any of th...

BACKGROUND/AIM We aimed to compare the results of WaveLight Allegretto Wave Eye-Q 400 Hz and Technolas 217z100 excimer lasers in the treatment of mixed astigmatism. MATERIALS AND METHODS Forty-nine patients who underwent laser in situ keratomileusis for mixed astigmatism were included in this retrospective study. Twenty-eight eyes of 21 patients were treated with WaveLight and 46 eyes of 28 p...

PURPOSE To perform the first Brazilian refractive surgery survey. METHODS Between August 2001 and February 2002, a questionnaire was mailed to 7890 Brazilian ophthalmologists. The questionnaire presented questions about demographic aspects, technology, instruments, market, trends, practice patterns and cost of refractive surgery. RESULTS Nine hundred and twenty questionnaires (11.67%) were ...

PURPOSE To compare the outcomes of topography-guided and wavefront-optimized treatment in patients having laser in situ keratomileusis (LASIK) for myopia. SETTING Advanced Eye Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India. DESIGN Prospective contralateral-eye case study. METHODS Patients had topography-guided LASIK in 1 eye and wavefront-optimized LA...