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Eyewear
Eyeglasses, goggles or other objects worn over the eyes, usually to aid vision or for protective purposes.
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Eyewear > Optometry 
prismatic power prism
Eyewear; Optometry
Value of the prismatic effect at the design reference point.
prismatic power lens
Eyewear; Optometry
Lens with a prismatic effect at the design reference point or, for progressive-power lenses, at the prism checking point.
prismatic power
Eyewear; Optometry
The deviation of a ray of light through a specified point on a lens.
prismatic deviation
Eyewear; Optometry
Change in direction imposed on a ray of light as a result of refraction.
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.
photochromatic material
Eyewear; Optometry
Material which reversibly changes its luminous transmittance characteristics depending upon the intensity and wavelength of the radiation falling upon it.
Sub-categories
- Contact lenses (3070)
- Eye surgery (2811)
- Glasses (802)
- Optometry (16172)
- Sunglasses (524)