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“bifocal”
1. Eye glasses with lenses that are divided into two parts with one section that corrects for distant vision and another that corrects for near vision, as an eyeglass lens; in other words: the upper half is for looking at things far away and the lower half is for reading or for looking at things that are near the viewer.
2. Embodying two distinct and often conflicting goals, interests, or courses of action: Bibocals are eyeglasses made with double lenses of different focuses so that the wearer may have one focus for distant vision and one of close focus for reading.
2. Embodying two distinct and often conflicting goals, interests, or courses of action: Bibocals are eyeglasses made with double lenses of different focuses so that the wearer may have one focus for distant vision and one of close focus for reading.
This entry is located in the following units:
bi-, bin-, bino-, bis-
(page 3)
focus-, foci-
(page 1)
Word Entries containing the term:
“bifocal”
A lens used in cases of presbyopia, in which one portion is suited for distant vision, the other for reading and close work in general: The reading addition of a bifocal lens may be cemented to the lens, fused to the front surface, or ground into a one-piece form.
Other bifocal lenses are the flat-top Franklin type, or blended invisibly.
This entry is located in the following units:
bi-, bin-, bino-, bis-
(page 3)
focus-, foci-
(page 1)
lenti-, lent-, lens- +
(page 1)