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Definition of Bifocals
1. Noun. Eyeglasses having two focal lengths, one for near vision and the other for far vision.
Definition of Bifocals
1. Noun. spectacles that have corrective lenses of two different powers; used by people who need both distance and reading glasses ¹
¹ Source: wiktionary.com
Definition of Bifocals
1. bifocal [n] - See also: bifocal
Lexicographical Neighbors of Bifocals
Literary usage of Bifocals
Below you will find example usage of this term as found in modern and/or classical literature:
1. Refraction of the Human Eye and Methods of Estimating the Refraction by James Thorington (1916)
"bifocals, or what is equivalent to bifocals, are made in different ways. i. ...
bifocals of this kind are not in common use. The field of distant vision is ..."
2. Papers to be Presented Before the Section on Ophthalmology of the American by Section on Ophthalmology, American Medical Association (1911)
"This was prescribed, with +0.75 Sph. added in bifocals. There was no paralysis of
... She was given +3.00 Sph. in a grab front to be worn over her bifocals. ..."
3. Annals of Ophthalmology (1917)
"This gives much relief and avoids bifocals for many months. When an increased
strength of lens for close work is necessary, it is often difficult to ..."
4. Oculo-refractive Cyclopedia and Dictionary by Thomas George Atkinson (1921)
"bifocals were the original device of Benjamin Franklin, and there have been
innumerable different forms devised and used from Franklin's time to the present ..."
5. The Medical and Surgical Reporter (1890)
"... was granted a patent on bifocals, which were the first ground bifocals made
in this country. (Fig. 3.) The tipper half was used for distant vision, ..."
6. The Women's Health and Aging Study: Health and Social Characteristics of ...edited by Jack M. Guralnik, Linda P. Fried, Eleanor M. Simonsick, Judith D. Kasper, Mary E. Lafferty edited by Jack M. Guralnik, Linda P. Fried, Eleanor M. Simonsick, Judith D. Kasper, Mary E. Lafferty (1995)
"(IF bifocals: Please look through the part of your glasses that you use to see
... PARTICIPANT WEARS: GLASSES 1 bifocals OR TRIFOCALS 2 CONTACT LENSES 3 NO ..."
7. A Manual of Personal Hygiene: Proper Living Upon a Physiological Basis by Walter Lytle Pyle (1907)
"The improved form, with a reduced additional convex segment, cemented on the
distance lens, is far more satisfactory than the old split Franklin bifocals. ..."
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