bifocal

bifocal

bi·fo·cal / ˈbīˌfōkəl/ • adj. (usually of a pair of eyeglasses) having lenses each with two parts with different focal lengths, one for distant vision and one for near vision. • n. (bifocals) a pair of eyeglasses having two such parts.

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"bifocal." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

"bifocal." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O999-bifocal.html

"bifocal." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-bifocal.html

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bifocal

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"bifocal." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

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"bifocal." Oxford Dictionary of Rhymes. 2007. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-bifocal.html

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Free newspaper and magazine articles

Bifocal Safety Eyewear has 3.0 diopter magnification lens.(New! Gateway...
Magazine article from: Product News Network; 1/18/2011
Allergan markets a new bifocal lens. (Allergan Optical's Hydron Echelon soft...
Magazine article from: Chain Drug Review; 7/16/1990
PixelOptics develops notable alternative to bifocals.
Magazine article from: Biomedical Business &amp; Technology; 6/5/2011

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