orthoscope

orthoscope

[awr-thuh-skohp]
noun Ophthalmology.
(formerly) an instrument for examining the internal structures of the eye through a layer of water that neutralizes the refraction of the cornea.

Origin:
1890–95; ortho- + -scope

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Collins
World English Dictionary
orthoscope (ˈɔːθəʊˌskəʊp)
 
n
obsolete med a 19th-century instrument for viewing the fundus of the eye through a layer of water, which eliminates distortion caused by the cornea

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

orthoscope or·tho·scope (ôr'thə-skōp')
n.
An instrument used to examine the eye that eliminates corneal refraction by means of a layer of water.

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