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

Lens form

Eyewear; Optometry

Combination of surface powers chosen to produce the given focal power.

Prismatic power prism

Eyewear; Optometry

Value of the prismatic effect at the design reference point.

Prismatic power lens

Eyewear; Optometry

Lens with a prismatic effect at the design reference point or, for progressive-power lenses, at the prism checking point.

Prismatic power

Eyewear; Optometry

The deviation of a ray of light through a specified point on a lens.

Prismatic deviation

Eyewear; Optometry

Change in direction imposed on a ray of light as a result of refraction.

Photochromic lens

Eyewear; Optometry

Lens which reversibly changes its luminous transmittance characteristics depending upon the intensity and wavelengths of the radiation falling upon it.

Photochromic fatigue

Eyewear; Optometry

Irreversible change in luminous transmittance characteristics of a photochromic material with time, usually after prolonged cumulative and/or repeated exposure to radiation.