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

Absorptance

Eyewear; Optometry

Fraction of the incident radiation which is neither reflected nor transmitted.

Absorptive lens

Eyewear; Optometry

Lens designed to absorb a certain range or proportion of incident radiation.

Active ophthalmic instrument

Eyewear; Optometry

Any ophthalmic instrument connected with a permanetly installed source of electrical power engergy.

Additive power trial case lens set

Train of spherical, cylindrical or spherocylindrical combination of trail case lenses, in which the measured back-vertex power at the last surface equals the meridional sum of the labelled values of ...

Adjusting rail

Eyewear; Optometry

A movable rail or bar, used as the reference axis for spectacles during measurement.

Alignment reference marking

Eyewear; Optometry

Permanent markings provided by the manufacturer to establish the horizontal alignment of the lens or lens blank, or to reestablish other reference points.