[bahy-foh-kuh l, bahy-foh-]
- Chiefly Optics. having two foci.
- (of an eyeglass or contact lens) having two portions, one for near and one for far vision.
- bifocals, bifocal eyeglasses or contact lenses.
Origin of bifocal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for bifocals
I rang the bell, and a geeky, middle-aged man in bifocals stuck his head around the door.Hold the Dressing
November 11, 2008
That surprised, him, and he eyed me over the top of his bifocals.Cue for Quiet
Thomas L. Sherred
The bifocals had returned to their incongruous perch on the dome of the head.The Brain
I removed my glasses to make certain (someday I shall simply have to get bifocals) and saw that it was a foreign cookbook."To Invade New York...."
The turnstiles were blocked by a sandwich board: Mickey in a Ben Franklin wig and bifocals, holding a trowel.Down and Out in the Magic Kingdom
- a pair of spectacles with bifocal lenses
- optics having two different focuses
- relating to a compound lens permitting near and distant vision
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for bifocals
"bifocal spectacles," 1899, see bifocal. Conceived by Benjamin Franklin, but called by him double spectacles.
Online Etymology Dictionary, © 2010 Douglas Harper
- Having two focal lengths.
- Having one section that corrects for distant vision and another that corrects for near vision.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.