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- plural of dioptric
- the study of the refraction of light, especially by lenses
- The Nuttall Encyclopedia
Di*op"trics (?), n. [Gr. &?; &?;: cf.
F. dioptrique.] (Optics) The science of the
refraction of light; that part of geometrical optics which treats of
the laws of the refraction of light in passing from one medium into
another, or through different mediums, as air, water, or glass, and
esp. through different lenses; -- distinguished from
catoptrics, which refers to reflected light.
- Webster's Unabridged Dictionary (1913)
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