dioptrical

Of or pertaining to dioptrics; assisting vision by means of the refraction of light; refractive; as, the dioptric system; a dioptric glass or telescope. 'Dioptrical principles. ... <geometry> ' Dioptric curve, a Cartesian oval. See Cartesian. ... Origin: Gr. Belonging to the use of the; = through + the root of I shall see: cf. F. Dioptrique. ...
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Dioptrical

• (a.) Of or pertaining to dioptrics; assisting vision by means of the refraction of light; refractive; as, the dioptric system; a dioptric glass or telescope.
Found on http://thinkexist.com/dictionary/meaning/dioptrical/
No exact match found