SG Heritage Dictionary

Dioptric [Adjective] Webster's Dictionary 1913

1. Of or pertaining to the dioptre, or to the metric system of numbering glasses.

2. Alt. of Dioptrical

Dioptric [Noun] Webster's Dictionary 1913

A dioptre. See Dioptre.

Dioptrical [\N] Webster's Dictionary 1828

1. DIOPTRIC, DIOPTRICAL adjective [Gr., to see through; to see.]

2. Affording a medium for the sight; assisting the sight in the view of distant objects; as a dioptric glass.

3. Pertaining to dioptrics, or the science of refracted light.

Dioptrical [Adjective] Webster's Dictionary 1913

Of or pertaining to dioptrics; assisting vision by means of the refraction of light; refractive; as, the dioptric system; a dioptric glass or telescope.

Dioptrics [Noun] Webster's Dictionary 1828

That part of optics which treats of the refractions of light passing through different mediums, as through air, water or glass.

Dioptrics [Noun] Webster's Dictionary 1913

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.