Plácido's disk


noun Ophthalmology.

a device marked with concentric black rings, used to detect corneal irregularities.

Origin of Plácido's disk

after A. Plácido da Costa (1848–1916), Portuguese ophthalmologist, who devised it Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

placido's disk in Medicine

Placido's disk



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