Photochromic lens

Photochromic lens

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

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Part of Speech: noun
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Industry/Domain: Eyewear
Category: Optometry
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Related terms

photochromic lens

Eyewear; Optometry

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

lens

Biology; Neuroscience

Transparent structure in the eye whose thickening or flattening in response to visceral motor control allows light rays to be focused on the retina.

lens

Physics; Optics

A piece of glass that is shaped in such a way as to form an image. Lenses work by changing the direction of light.

lens

Photography; Lenses

One or more pieces of optical glass or similar material designed to collect and transfer rays of light to form a sharp image on film, paper or a projection screen. In practical ...

lens

Earth science; Remote sensing

One or more pieces of glass or other transparent material shaped to form an image by refraction of light.

lens

Health care; Optometry

1. The nearly spherical body in the eye, located behind the cornea, that focuses light rays onto the retina. 2. A device used to focus light into the eye in order to magnify or ...

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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