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Photochromic

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 windshield. Lenses such as Transitions® Lenses don’t get quite as dark as normal sunglasses nor do they get perfectly clear when they lighten.

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  • Part of Speech: noun
  • Synonym(s):
  • Blossary:
  • Industry/Domain: Eyewear
  • Category: Glasses
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Related terms

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

photochromic
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photochromic
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Of or pertaining to photochromy; produced by photochromy.

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

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

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