trifocal glasses


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Related to trifocal glasses: Bifocals, bifocal glasses, Progressive lenses

glasses

 [glas´ez]
lenses arranged in a frame holding them in the proper position in front of the eyes, as an aid to vision. Called also eyeglasses and spectacles.
bifocal glasses glasses with bifocal lenses; see also bifocal glasses.
trifocal glasses glasses with trifocal lenses.

trifocal glasses

Glasses with three different corrections in each lens: one each for near, intermediate, and far vision.
See also: glasses