BACKGROUND A new technique, therapeutic alloplastic laser in situ keratomileusis to correct high myopia, is introduced. METHODS Therapeutic alloplastic laser in situ keratomileusis consists of neutral homoplastic epikeratoplasty combined with superficial keratectomy performed with an excimer laser and/or a microkeratome. Indications for the technique are: myopia over 20 diopters (D), eyes wit...

In this article, we use a longitudinal census of laser in situ keratomileusis (LASIK) eye surgeries collected directly from patient charts to examine the learning-by-doing hypothesis in medicine. LASIK surgery has precise measures of presurgical condition and postsurgical outcomes. Unlike other types of surgery, the impact of unobservable underlying patient conditions on outcomes is minimal. In...

Purpose: To evaluate the safety and reproducibility of using +3 Ring Moria M2 microkeratome (Mechanical Technology) with patients suffering from high K reading. Setting: Eye Care Private Centre-surgery Centre, Jeddah, Saudi Arabia. Methods: Data had been reviewed starting from 2005 up to 2010; with the aim to review and evaluate all the data and complications after using +3 Ring Moria M2 single...

PURPOSE To evaluate the effect of laser in situ keratomileusis (LASIK) on stereoacuity (SA). METHODS This prospective study includes 200 patients scheduled for LASIK. SA was evaluated preoperatively and one week, one month and three months postoperatively using the Random Dot test. Patients with preoperative SA worse than 480 sec/arc were excluded from the study. RESULTS The study included ...

Optical side-effects of fs-laser treatment in refractive surgery are investigated by means of a model eye. We show that rainbow glare is the predominant perturbation, which can be avoided by randomly distributing laser spots within the lens. For corneal applications such as fs-LASIK, even a regular grid with spot-to-spot distances of ~3 µm is sufficient to minimize rainbow glare perception. Con...

High astigmatism correction represents a challenge for the refractive surgeon with current available technology. Excimer laser correction should be considered as an option in the available therapeutic arsenal. We report a patient with astigmatism higher than eight diopters to whom it was used a treatment with LASIK (Laser Assisted In Situ Keratomileusis) in two surgical moments, using a new gen...

PURPOSE To longitudinally follow epithelial thickness profile changes after myopic LASIK for 1 year to determine when and how epithelial changes occur and when epithelial stability is reached. METHODS Epithelial thickness was measured with Artemis very high-frequency digital ultrasound (ArcScan Inc) across the central 10-mm corneal diameter in 11 eyes before and 1 day, and 1, 3, 6, and 12 mon...

AlSi10Mg inclined struts with angle of 45° were fabricated by selective laser melting (SLM) using different scanning speed and hatch spacing to gain insight into the evolution of the molten pool morphology, surface roughness, and dimensional accuracy. The results show that the average width and depth of the molten pool, the lower surface roughness and dimensional deviation decrease with the inc...

In this paper, aluminum alloy samples were fabricated by selective laser melting (SLM) and subsequently T2 heat treatment was undertaken. In order to obtain comprehensive results, various experiments on densification, hardness, tensile strength, bending strength and microstructure characterization were carried out. The results show that densification of samples after T2 heat treatment does not ...