bifocal

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Related to bifocal glasses: trifocal glasses

bifocal

1. Optics having two different focuses
2. relating to a compound lens permitting near and distant vision
References in periodicals archive ?
The best solution, said Anshel, is "occupational progressives," which are glasses that provide correction for near and intermediate viewing rather than the near and far viewing of normal bifocal glasses.
Mr Twomlow told Cardiff Crown Court when some customers were prescribed a pair of bifocal glasses, Malpas- James would claim for two different pairs from the NHS.
Along with close vision for reading, and distance for driving or watching movies, progressives are particularly good for people who use computers because they cover intermediate distances that appear too blurry in bifocal glasses.
In a charming way, she explains her fears of surgery, of going back to school, and finally her pride in showing off her beautiful blue eyes in her bifocal glasses.
However, depending on the sport, bifocal glasses can make intermediate-range hand-eye coordination difficult.
Traditional bifocal glasses have a divided lens with the bottom area adapted for close-up viewing.