• Webster's Revised Unabridged Dictionary
    • Eyestone A small, lenticular, calcareous body, esp. an operculum of a small marine shell of the family Turbinid√¶, used to remove a foreign substance from the eye. It is put into the inner corner of the eye under the lid, and allowed to work its way out at the outer corner, bringing with it the substance.
    • Eyestone (Min) Eye agate. See under Eye.
    • ***
Century Dictionary and Cyclopedia
    • n eyestone A small calcareous body, the operculum of small Turbinidæ, flat on one side and convex on the other, used for removing substances from between the eyelid and the eyeball. When put into the inner coiner of the eye, it works its way out at the outer corner, bringing with it any foreign substance which may be causing irritation.
    • ***


In literature:

I always keep three eyestones in my purse.
"A Summer in Leslie Goldthwaite's Life." by Mrs. A. D. T. Whitney
Meanwhile a neighbor, Mrs. Wilbur, suggested putting an eyestone into Halstead's eye to get out the irritating substance.
"A Busy Year at the Old Squire's" by Charles Asbury Stephens
Why should not eyestones be used?
"A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition)" by Calvin Cutter

In news:

Adapted Melody Chime Ensemble player Robert Eyestone rests his hands as he sings "It's a Small World" for the group during practice Sept 24 at Stephens Lake Activity Center.
Cardinal Newman defeated Northside Christian 65-64 to win the King's Academy Invitational, (Allen Eyestone/The Palm Beach Post) Northside Christian vs Cardinal Newman 12-31-2010.