Aspheric

Aspheric

Not quite spherical. Aspheric eyeglass lenses are popular among people who have strong prescriptions because they are thin and lightweight, and reduce distortion and eye magnification. Aspheric contact lenses can work as a multifocal, or to correct a single-vision problem like astigmatism.

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Part of Speech: noun
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Industry/Domain: Health care
Category: Optometry
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aspheric

Health care; Optometry

Not quite spherical. Aspheric eyeglass lenses are popular among people who have strong prescriptions because they are thin and lightweight, and reduce distortion and eye ...

aspheric

Astronomy; General astronomy

An optical surface with departures in shape from a perfect sphere in order to cancel optical imperfections or aberrations.

aspheric

Aviation; Aeronautics

The characteristics of an optical element that contains one or more surfaces that are not spherical.

aspheric lens

Eyewear; Optometry

Lens in which at least one surface deviates from a spherical shape.

aspherical surface

Eyewear; Optometry

Part of a surface of revolution having continuously variable curvature from the vertex to the periphery.

aspherical lens

Photography; Professional photography

A lens with a non-spherical curve used to compensate for a variety of aberrations, including spherical aberrations. Such lenses are effective in controlling the distortion ...

ophthalmoscope

Eyewear; Optometry

An optical instrument used to examine the external and internal parts of the eye, particularly the media and the fundus.

pantoscopic angle

Eyewear; Optometry

1. Angle in the vertical plane between the optical axis of a spectacle lens and the visual axis of the eye in the primary position, usually taken to be the horizontal. 2. Angle ...

optical material

Eyewear; Optometry

Transparent material capable of being manufactured into optical components.

optical radiation hazard

Eyewear; Optometry

Possibility of damage to the retina by optical radiation.

optical centre

Eyewear; Optometry

For practical purposes, the intersection of the optical axis with the front surface a lens.

ophthalmoscope

Optometry; Optometry

An optical instrument used to examine the external and internal parts of the eye, particularly the media and the fundus.

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