Optometry

Optometry

A health care profession concerned with eyes and related structures, as well as vision, visual systems, and vision information processing in humans. The practice of eye and vision care.

Industry: Eyewear; Health care

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Optometry

Main lens

Eyewear; Optometry

Lens to which one or more segment lenses are added to make a multifocal lens.

Major portion

Eyewear; Optometry

That portion of a lens with the larger or largest field of view.

Major reference point

Eyewear; Optometry

That point on the front surface of the lens at which the dioptric power for the distance portion shall apply.

Margin

Eyewear; Optometry

That part of a lenticular lens surrounding the lenticular portion.

Matching lens

Eyewear; Optometry

Lens fitted to a spectacle frame or mount to balance the weight and/or the appearance of the other lens. Also known as balancing lens.

Focal power

Eyewear; Optometry

General term comprising the spherical and astigmatic vertex powers of a spectacle lens.

Focimeter

Eyewear; Optometry

An instrument that is used to measure vertex powers and prismatic effects of spectacle and contact lenses, to orientate and mark uncut lenses, and to verify the correct mounting of lenses in ...