# Troxler effect

> English word · Proper noun

## Definitions
1. An optical illusion whereby, when a person fixes the gaze on a particular point, an unchanging stimulus away from the fixation point appears to fade away and disappear.

## Etymology
First identified by Swiss physician Ignaz Paul Vital Troxler in 1804.

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