RhymeZone: dioptric definitions

Definitions of dioptric:

adjective: Acting as a medium for sight; making use of refraction (of lenses, etc.).
adjective: (obsolete) Pertaining to a diopter.
adjective: (obsolete) Capable of being seen through.
noun: (in the plural) The branch of optics concerned with refraction.
noun: A dioptric telescope.

(Definitions from Wiktionary)