1.
bifocal; progressive; for both near and far vision
Describing eyeglasses or lenses designed for both near and distant vision. Literally "combined use of far and near."
遠近両用のメガネ。
Bifocal glasses.
Formed from 遠近 (far and near) + 両用 (dual use). Almost always used attributively with の before 眼鏡 (glasses), レンズ (lens), or コンタクト (contacts).
Common collocations
Usage
Modern 遠近両用 lenses are usually "progressive" (a gradual change in strength) rather than the old split-line bifocal, but the same word covers both.