# Snellen chart

> English word · Noun

## Definitions
1. A chart bearing letters or other symbols, used to test visual acuity.

## Etymology
Named after the Dutch ophthalmologist Hermann Snellen, who developed the chart in 1862.

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