DEVICE: REFRACTIVE POWER / CORNEAL ANALYZER (04987669100776)

An assembly of ophthalmic devices used to measure the curvature and concentricity of the anterior corneal surface. It typically consists of a line-powered videokeratoscope using Placido imaging (involves disk with concentric white and black rings), and application software for installation in an included computer workstation, or external computer, for image processing and analysis. This device will be used to evaluate the need for refractive eye surgery, e.g., laser assisted in situ keratomileusis (LASIK) treatment.

An electrically-powered ophthalmic device intended for qualitative assessment of the curvature of the anterior surface of the cornea, typically to detect astigmatism during ophthalmic surgery; it is not a keratometer. It may be designed as a hand-held instrument or to be mounted on a device (e.g., on an ophthalmic surgical microscope) and emits concentric rings of light onto the corneal surface (similar to a Placido disk) whereby the distorted reflection of the light rings on the cornea of the patient is indicative of astigmatism. This is a reusable device.

An electrically-powered, ophthalmic device designed to be used by a healthcare professional to objectively measure the refractive error of the eye (the inaccuracies of focusing light upon the retina) by measuring how light is changed when it enters the patient's eye(s). The device emits light into the eye and detects the light reflection which is measured for sphere, cylinder, axis and/or high order aberration measurements, typically measured in dioptres (the reciprocal of the focal length of the lens expressed in metres). Also known as an aberrometer, the device uses this information to automatically calculate the lens prescription needed to correct the patient's vision.