Corneal ectasia is a serious vision-threatening complication of laser in situ keratomileusis (LASIK). It is associated with progressive corneal steepening, an increase in myopia and astigmatism, and decrease in uncorrected visual acuity. Before LASIK presence of risk factors (corneal thickness, refractive error, presence of clinical and subclinical corneal pathologies) should be studied so pati...

PURPOSE To report the clinical outcome of laser in situ keratomileusis (LASIK) cases complicated by severe central intraoperative epithelial defects (EDs) caused by the microkeratome cut. SETTING Department of Ophthalmology, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany. METHODS In a retrospective study of 1650 LASIK cases at 1 center, the preoperative data, surgical procedu...

PURPOSE The evaluation of the safety, efficacy, and long-term stability of LASIK procedures utilizing novel platform comprising a femtosecond and excimer laser and multiple networked diagnostics. SETTING Private clinical ophthalmology practice. PATIENTS AND METHODS In consecutive cases of myopic LASIK procedure with a novel refractive platform (FS200 Femtosecond and EX500 Excimer Laser), 19...

PURPOSE To investigate the repeatability and reproducibility of the Visante Omni topography in obtaining topography measurements of rabbit corneas and to develop a post-surgical model of corneal ectasia. METHODS Eight rabbits were used to study the repeatability and reproducibility by assessing the intra- and interobserver bias and limits of agreement. Another nine rabbits underwent different...

BACKGROUND The purpose of this study was to evaluate the safety and efficacy of topography-guided ablation using the WaveLight 400 Hz excimer laser in laser-assisted in situ keratomileusis (LASIK) for hyperopia and/or hyperopic astigmatism. METHODS We prospectively evaluated 208 consecutive LASIK cases for hyperopia with or without astigmatism using the topography-guided platform of the 400 H...

PURPOSE To compare refractive outcomes and higher order aberrations of eyes that underwent LASIK for myopia with astigmatism with or without active cyclotorsion error correction. METHODS This was a contralateral eye study of 48 eyes of 24 patients who underwent LASIK using the NIDEK Advanced Vision Excimer laser platform (NAVEX), treating one eye with active cyclotorsion error correction (TEC...

Background: The most common refractive surgical surgery for the treatment of myopia, hyperopia, and astigmatism is laser assisted in situ keratomileusis (LASIK). A very important step LASIK formation flap. corneal flap was made using a variety microkeratomes. purpose this study to compare central thickness following flap.Methods: This retrospective comparative performed on 200 eyeballs divided ...

PURPOSE To evaluate the efficacy and safety of a single-step, transepithelial, topography-guided surface ablation in the treatment of visual disturbances including irregular astigmatism and light scattering caused by LASIK flap or interface complications. METHODS Seventeen eyes of 16 patients with LASIK flap or interface complications and central residual stromal thickness ≥300 μm were treate...

Laser in situ keratomileusis (LASIK) is an effective procedure to treat a wide range of myopia. The advantages of LASIK over photorefractive keratectomy (PRK) are rapid visual recovery, lower risk of corneal haze, greater regression of myopia, and less postoperative pain. However, LASIK requires more skillful surgical technique and more instrumentation than PRK. Thus, inaccurate and inadequate ...