bifocals

Etymology
From bi- + focal (see focus), coined in 1824 by John Isaac Hawkins, inventor of trifocals. When the concept of bifocals was originally conceived by Benjamin Franklin, he called them double spectacles.

Noun

 * 1) Spectacles that have corrective lenses of two different powers; used by people who need both distance and reading glasses.

Translations

 * Chinese:
 * Mandarin:
 * Finnish: kaksiteholasit
 * French: verres bifocaux, verres double foyer
 * German: Bifokalbrille, Zweistärkenbrille
 * Navajo: nákʼee sinilí naakijįʼ bee hootʼínígíí