16 matching records for Spectacle Lens.
An ophthalmic device in the form of a separate lens, spectacles or lorgnette intended to be used to determine/diagnose ophthalmic conditions (e.g., pseudofovea, abnormal retinal correspondence, suppression and diplopia). The lens has narrow striations runni...
A thin, plastic, flap-like device that is clipped onto the upper frame of a pair of existing spectacles (eyeware) to block vision through the spectacle lens. It is typically made of plastic and is available in preformed, leaf-shaped, disks, usually with a p...
An optical device made of glass or plastic that is a semi-finished lens made by the manufacturer intended to be further processed (e.g., further grinding, polishing and cutting) according to a specific patient prescription before it can be mounted into a sp...
An ophthalmic lens made of a treated glass or plastic intended to be worn in front of the eyes to attenuate rays of light by absorption, reflection, or polarization to protect the eyes from bright light; it is neither intended to provide refractive correcti...
An ophthalmic lens made of glass or plastic that is manufactured in accordance with a specific patient prescription (custom-made) and intended to be worn in front of the eyes to correct the refractive errors of that patient's eyesight, e.g., refractive amet...
An ophthalmic instrument designed to manually measure the curvature of the surface of a spectacle lens. It is usually calibrated in dioptres of surface power for a given refractive index.
An ophthalmic lens made of glass or plastic that is manufactured in accordance with a standard prescription (not customized for a specific patient) and intended to be worn in front of the eyes to correct the refractive errors of a patient's eyesight, e.g., ...
A very thin and flexible ophthalmic lens intended to be applied to the back of spectacle lenses to focus light to a focal point to help manage various vision conditions including aphakia (absence of the lens of the eye), myopia, hyperopia, and presbyopia. I...
An ophthalmic device made of a treated glass or plastic that is used to attenuate rays of light by absorption, reflection, or polarization to protect the eyes from bright light, but not to provide refractive corrections. This device may require cutting to e...
A mains electricity (AC-powered) ophthalmic instrument designed to measure the focusing power (dioptric power) and other optical characteristics of a spectacle lens, contact lens, or prism. The device is fully automated and does not require manual adjustmen...
A mains electricity (AC-powered) ophthalmic instrument designed to measure the focusing power (dioptric power) and other optical characteristics of a spectacle lens, contact lens, or prism through manual adjustments to the instrument performed by the operat...
A device used to hold prisms, spheres, cylinders, or occluders on a trial lens frame or set of spectacles during vision testing. This is a reusable device.
An electrically-powered lamp mounted on a headband, helmet frame, or spectacles and intended to provide light directly onto the field of vision during a dental or surgical procedure. The light typically consists of a magnifying lens, a reflector, a light bu...
An electrically-powered, head-worn, ophthalmic instrument designed to be held arm’s length from the patient to examine the interior of the eye and related structures [e.g., fundus (retina), cornea, aqueous, lens, vitreous] using the examiner’s two eyes simu...
A battery-powered, hand-held, torch-like device designed to visualize, and facilitate identification of, abnormalities of the oral mucosa (e.g., malignancy, dysplasia, bacterial and fungal infections) using one or more wavelengths (colours) of light. It may...
A magnifying ophthalmic lens designed to be attached to a pair of spectacles and intended to enlarge text/images for a visually impaired patient/person. It is also known as a magnifying glass and can be made of solid plastic material or glass within a plast...