bifocals

English

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

bifocals pl (plural only)

1. Spectacles that have corrective lenses of two different powers; used by people who need both distance and reading glasses.
   • 2002, Zadie Smith, The Autograph Man, Penguin Books (2003), page 116:

     He unfolded a pair of bifocals and thrust them as far up the bridge of his nose as possible.

Derived terms

• bifocaled

 

Related terms

• bifocal
• multifocals
• trifocals

Translations

spectacles with two different powers

• Chinese:

  Mandarin: please add this translation if you can

• Finnish: kaksiteholasit
• French: verres bifocaux m pl, verres double foyer m pl
• German: Bifokalbrille f, Zweistärkenbrille f
• Navajo: nákʼee sinilí naakijįʼ bee hootʼínígíí