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opto-

1.
a combining form meaning “optic” or “vision,” used in the formation of compound words:
optometry.
Origin
< Greek optós visible; akin to ṓps face; cf. eye
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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opto in Medicine

opto- or opt-
pref.
Eye; vision: optometry.

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