DEVICE: VISIONIX (03664188000909)

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.

A mains electricity (AC-powered), ophthalmic, device that uses optics to measure the thickness of the cornea. Using optical low coherence reflectometry (OLCR) this device can possibly measure corneal thicknesses to a precision of one micron without having to make contact with the eye surface and no contact fluids are required, nor will it induce any indentation. This device, also known as a pachometer, will provide data that is used to evaluate the results of eye surgery [e.g., laser assisted in situ keratomileusis (LASIK) treatment], monitor epithelium regrowth, and for other ophthalmic measurement evaluations.

An ophthalmic, battery-powered, measuring instrument designed for determining the intraocular pressure (IOP) by exerting an external force against the eye which provides a reading of the resistance of the tunica of the eye to deformation (the extent of corneal indentation) which is expressed in millimetre(s) of mercury (mmHg). This hand-held device (known as a contact type, e.g., a Perkins tonometer) is often used for, e.g., the examination of postoperative, bedridden and paediatric patients.