1. dioptric - Noun
2. dioptric - Adjective
Of or pertaining to the dioptre, or to the metric system of numbering glasses.
A dioptre. See Dioptre.
Alt. of Dioptrical
Source: Webster's dictionaryAlthough Fresnel, who had also the satisfaction of being the first to put it into operation, perfected the dioptric apparatus independently, Brewster was active earlier in the field than Fresnel, describing the dioptric apparatus in 1812. Source: Internet