dioptric

adjective

di·​op·​tric dī-ˈäp-trik 

: refractive

specifically : assisting vision by refracting and focusing light

Word History

Etymology

Greek dioptrikos of a diopter (instrument), from dioptra

First Known Use

1653, in the meaning defined above

Medical Definition

dioptric

adjective

di·​op·​tric (ˈ)dī-ˈäp-trik 

variants also dioptrical

-tri-kəl 

1

: producing or serving in refraction of a beam of light : refractive

specifically : assisting vision by refracting and focusing light

the dioptric power of a lens

2

: produced by means of refraction

dioptric images

dioptrically

-tri-k(ə-)lē 

adverb