bifocal


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Related to bifocal: bifocal glasses

bi·fo·cal

 (bī-fō′kəl, bī′fō′-)
adj.
1. Having two focal lengths.
2. Having one section that corrects for distant vision and another that corrects for near vision, as an eyeglass lens.
3. Having two distinct goals or objects of attention: a bifocal approach to the problem.
pl.n. bi·fo·cals (bī′fō′kəlz, bī-fō′-)
Eyeglasses with bifocal lenses.
bi·fo′cal·ism n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

bifocal

(baɪˈfəʊkəl)
adj
1. (General Physics) optics having two different focuses
2. (Medicine) relating to a compound lens permitting near and distant vision
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

bi•fo•cal

(baɪˈfoʊ kəl, ˈbaɪˌfoʊ-)

adj.
1. having two foci.
2. (of an eyeglass or contact lens) having two portions, one for near and one for far vision.
n.
3. bifocals, bifocal eyeglasses.
[1885–90, Amer.]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.bifocal - having two foci; "bifocal eyeglasses"
optics - the branch of physics that studies the physical properties of light
central - in or near a center or constituting a center; the inner area; "a central position"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
ثُنائي البُؤْره
bifokální
bifokal
bifokális
tvískipt gleraugu
dviejų židinių
bifokāls
bifokálny
çift mercekliiki odaklı

bifocal

[ˈbaɪˈfəʊkəl]
A. ADJ → bifocal
B. N bifocals → gafas fpl bifocales
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

bifocal

adj → Bifokal-
n bifocals
pl → Bifokalbrille f
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

bifocal

(baiˈfəukəl) adjective
(of lenses) having two points of focus, which help people to see things close at hand and things far away.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.

bi·fo·cal

a. bifocal, referente a dos focos o enfoques.
English-Spanish Medical Dictionary © Farlex 2012

bifocal

adj bifocal; npl (fam) lentes mpl or gafas bifocales, bifocales mpl or fpl (fam)
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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References in periodicals archive ?
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Mplus IOLs (312 MF30, 313 MF30, and 312 MF30) were used in the refractive rotationally asymmetric multifocal IOL group, and spherical monofocal (Acri.Smart 48S) IOLs, accommodating IOLs (Crystalens HD), and refractive-diffractive bifocal IOLs (Acri.Lisa 366 and ReSTOR SN6AD 1/3) were used in comparison groups.
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Another way to help see that pesky front sight on a pistol with aging eyes is to use a low-powered flattop or lined bifocal set or a higher-than-normal lens in the shooting eye side.
Aging eyes

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