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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.

Contributors in Optometry

Optometry

Atoroidal surface

Eyewear; Optometry

Surface having mutually perpendicular principal meridians of unequal curvature, of which the cross-section in at least one principal meridian is not circular.

Back vertex focal length

Eyewear; Optometry

Distance in an optical system from the back surface to the focal point measured along the optical axis (axis of symmetry).

Auxiliary lenses

Eyewear; Optometry

Additional corrective lenses to facilitate access to higher refractive powers without an excessive numbers of lenses.

Balancing lens

Eyewear; Optometry

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

Atoric lens

Eyewear; Optometry

Lens with astigmatic power in which at least one principal meridian is not spherical.

Back surface

Eyewear; Optometry

That surface of the spectacle lens intended to be fitted nearer to the eye.

Astigmatic power lens

Eyewear; Optometry

Lens bringing a paraxial pencil of parallel light to two separate line foci mutually at right angles and hence having vertex power in only the two principal meridians.

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