bifocal

adj

Etymology: By surface analysis, bi- + focal, or, by surface analysis, bi- + foc(us) + -al.

1. Having two focal lengths.

   “His hair is black and well greased, with individual strands of gray, and he wears wire-rimmed bifocals with a subtle brownish tint.”

2. Divided into two parts, one of which corrects for distance vision and the other for near vision.