Bifocal Definition

bī-fōkəl, bīfō-
bifocals
adjective
Adjusted to two different focal lengths.
Webster's New World
Having two focal lengths.
American Heritage Medicine
Having one section that corrects for distant vision and another that corrects for near vision, as an eyeglass lens.
American Heritage Medicine
Having two distinct goals or objects of attention.
A bifocal approach to the problem.
American Heritage Medicine
(optics) Having two focal lengths.
Wiktionary
noun
A lens, esp. for eyeglasses, with one part ground for close focus, as for reading, and the other ground for distance.
Webster's New World
Eyeglasses with bifocal lenses.
American Heritage Medicine

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