adjusted to two different focal lengths
a lens, esp. for eyeglasses, with one part ground for close focus, as for reading, and the other ground for distance
- Having two focal lengths.
- Having one section that corrects for distant vision and another that corrects for near vision, as an eyeglass lens.
- Having two distinct goals or objects of attention: a bifocal approach to the problem.
Eyeglasses with bifocal lenses.