noun Ophthalmology.
an instrument, as Placido's disk, for determining the symmetry of the curvature of the cornea.

1885–90; kerato- + -scope

keratoscopy [ker-uh-tos-kuh-pee] , noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

keratoscope ker·a·to·scope (kěr'ə-tō-skōp')
An instrument marked with lines or circles for use in examining the curvature of the cornea. Also called Placido's disk.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Lines and circles within the keratoscope are used to observe the corneal reflex.
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