You searched for: “bifocal
bifocal
1. Having two focal lengths.
2. Having one section that corrects for distant vision and another that corrects for near vision, as an eyeglass lens.
3. 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
bifocal lens
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 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 invisible.

This entry is located in the following units: bi-, bin-, bino-, bis- (page 3) focus, foci + (page 1) lenti-, lent-, lens- + (page 1)