PURPOSE To investigate epithelial thickness-distribution characteristics in a large group of keratoconic patients and their correlation to normal eyes employing anterior-segment optical coherence tomography (AS-OCT). MATERIALS AND METHODS The study group (n=160 eyes) consisted of clinically diagnosed keratoconus eyes; the control group (n=160) consisted of nonkeratoconic eyes. Three separate,...

PURPOSE To evaluate the repeatability of the anterior and posterior corneal wavefront aberrations using the Sirius Scheimpflug-Placido topographer in normal eyes and keratoconus eyes. SETTING Bozok University Faculty of Medicine, Yozgat, Turkey. DESIGN Evaluation of diagnostic test. METHODS In eyes of healthy subjects and eyes of keratoconus patients, 3 repeated measurements were obtained...

PURPOSE To determine the natural history of collagen crosslinking (CXL)-associated corneal haze measured by Scheimpflug imagery and slitlamp biomicroscopy in patients with keratoconus or ectasia after laser in situ keratomileusis. SETTING Cornea and refractive surgery subpecialty practice, United States. DESIGN Prospective randomized controlled clinical trial. METHODS The treatment group ...

PURPOSE To test the validity of the color component subtraction method, a new objective technique of measuring nuclear cataract, and to correlate the tangent values of the different degrees of nuclear opacities to their corresponding subjective nuclear cataract grading using the Lens Opacities Classification System II and to another objective method of measuring nuclear cataract. METHODS Dens...

PURPOSE To compare the anterior segment indices measured by two Scheimpflug camera machines; Galilei and Pentacam. METHODS In this observational case series, the anterior segment indices of myopic healthy subjects seeking for refractive surgery were measured by Pentacam and Galilei on the same day. Analyzed parameters were anterior and posterior best fit spheres (BFS), axial curvature, true c...

Methods. Scheimpflug slit-lamp photography, as well as a variety of standard ophthalmologic methods, was used to collect information about lens and anterior segment sagittal dimensions in a population of 82 adults with refractive error < 12.01 diopters and at least 0.25 diopter of accommodation for subjects 18 to 70 years of age. Data were analyzed statistically for dependence on accommodation,...

Objective: To compare corneal aberrations and densitometry values in children with amblyopia due to anisometropic hyperopia those of healthy children.&#x0D; Methods: This study included 173 hyperopic anisometropia one eye both eyes. The amblyopic (Group 1) the fellow normal 2) patients right control group 3) were evaluated. Of aberration (CD)measured using Scheimpflug topography noted.&#x0D; Re...

Abstract Scheimpflug lidar is a compact alternative to traditional setups. With it possible make continuous range-resolved measurements. In this study we investigate the feasibility of instrument for remote sensing in pool flames, which are characterized by strong particle scattering, large temperature gradients, and substantial fluctuations distribution due turbulence. An extinction coefficien...