bifocals

Significado (Inglés)

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

Conceptos

bifocales

lente bifocal

Sinónimos

pince-nez

spectacles

👓

bifocal spectacle

Etimología (Inglés)

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.