# trifocals

> English word · Noun

## Definitions
1. Spectacles with corrective lenses that have three different powers per eye.

## Etymology
From tri- + focal (see focus). Coined by John Isaac Hawkins, their inventor, in 1826.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/trifocals