a combining form meaning “optic” or “vision,” used in the formation of compound words: optometry.

Origin of opto-

< Greek optós visible; akin to ṓps face; cf. eye
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for opto-



Eye; vision:optometry.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.