PURPOSE The purpose of this study was to evaluate the refractive and visual outcomes of wavefront-guided laser in situ keratomileusis (LASIK) in eyes with myopic astigmatism and cylindrical component ≥2.0 diopter (D). METHODS In this retrospective study, 611 eyes that underwent LASIK for simple or compound myopic astigmatism were analyzed. Preoperative refractive cylinder ranged from -2.00 D ...

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From Gordon Binder Weiss Vision Institute, San Diego, Calif (Binder); Minnesota Eye Consultants, Minneapolis, Minn (Lindstrom); Emory University, Atlanta, Ga (Stulting); Ophthalmic Consultants of Long Island, Rockville Centre, NY (Donnenfeld); Tufts New England Medical Center, Boston, Mass (Wu); Wilmer Ophthalmological Institute, Johns Hopkins University School of Medicine, Baltimore, Md (McDon...

The design, calibration, and performance of the Mars Orbiter Laser Altimeter (MOLA) receiver are described. The MOLA measurements include the range to the surface, which is determined by the laser-pulse time of flight; the height variability within the footprint determined by the laser echo pulse width; and the apparent surface reflectivity determined by the ratio of the echo to transmitted pul...

O ver the years, refractive surgeons have devised strategies for coping with some of the more common complications that can occur after LASIK. Nonetheless, ectasia, a condition characterized by a progressive increase in corneal curvature, remains somewhat of a mystery. Its most likely causes appear to be undetected preoperative keratoconus and excessively deep keratectomies. This article presen...

PURPOSE To report on keratoectasia after laser in situ keratomileusis (LASIK) in two eyes of two patients who had no obvious preoperative risk factors, and treatment of keratoectasia by intrastromal corneal ring segments. METHOD Clinical interventional case report. RESULTS Two patients underwent LASIK in both eyes at Shinagawa LASIK center, Tokyo. Preoperative standard ophthalmological exam...

JUNE 2010 CATARACT & REFRACTIVE SURGERY TODAY 41 I consider customized wavefront-guided laser vision correction a critical component of today’s refractive surgical practice, because it delivers better outcomes than conventional treatments. Since I began performing customized corrections using the iLASIK suite (Abbott Medical Optics Inc., Santa Ana, CA) along with other technological improvement...

PURPOSE To report the intraoperative management of incomplete microkeratome LASIK flaps. DESIGN Small, retrospective, noncomparative, interventional case series. PARTICIPANTS Five outpatients. METHODS In 5 eyes of 5 patients, the premature stop of the microkeratome resulting from mechanical obstacles resulted in an incomplete flap that would not allow for the completion of the LASIK proce...

PURPOSE To compare the changes in posterior corneal curvature using scanning slit topography (Orbscan II) and Scheimpflug imaging (Pentacam) before and after Epi-laser in situ keratomileusis (LASIK) for myopia. METHODS In a prospective observational case-series study, 20 myopic patients having undergone Epi-LASIK were examined serially with two different devices, Orbscan II and Pentacam, preo...