- Physiology. the closing of the eyelids induced by touching the cornea lightly.
- Ophthalmology. the reflection of a keratoscope, as Placido's disk, on the surface of the cornea.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- Contraction of the eyelids when the cornea is lightly touched.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.