orthoscope

or·tho·scope

[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) [Click for IPA pronunciation guide]
 
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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00:10
Orthoscope is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
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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