Home > Terms > English, UK (UE) > Photochromic

Photochromic

Able to change lens colour or darkness/density depending upon the degree of exposure to light.

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  • Industry/Domain: Health care
  • Category: Optometry
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Related terms

photochromic
Health care; Optometry

Able to change lens color or darkness/density depending upon the degree of exposure to light.

photochromic
Eyewear; Glasses

These lenses automatically turn dark in bright light and lighten indoors. The lenses are activated by ultraviolet light and will not darken behind the protection of your ...

photochromic
Language; Dictionaries

Of or pertaining to photochromy; produced by photochromy.

photochromism
Science; General science

A change of color occurring in certain substances when exposed to light. Photochromic materials are used in sunglasses that darken in bright sunlight.

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.

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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