# photorefraction

> English word · Noun

## Definitions
1. A nonlinear optical effect seen in certain crystals and other materials that respond to light by altering their refractive index.
2. The refraction of light, typically within the eye.

## Etymology
From photo- + refraction.

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