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n. spectacles that have corrective lenses of two different powers; used by people who need both distance and reading glasses

noun-plural. eyeglasses whose lenses have two foci, allowing the wearer to see both far and nearby objects clearly. The lenses are partitioned horizontally, the upper and lower parts having different focal lengths.

n. eyeglasses having two focal lengths, one for near vision and the other for far vision

"I'm totally against the idea of bifocals, since I know I will probably need them in the next few years, but screwing up my ability to do my job would not be a good idea either."

glasses    spectacles    eyeglasses    specs   

bifocal    trifocals