Invert colors purpose?

Wife just showed me if you goto to settings > general > accessibility > invert colors you can make your phone look like a photo negative. This may have been discussed before but I couldn't find it. If it has I am sorry, but I was just wondering what was the purpose of this, seems harder to read

9 Best Image Inverters to Invert Colors Without Quality Loss

How to Invert Colors in Photoshop: Ultimate Guide

How to Invert Colors on iPhone

Photoshop Invert Colors Photo Effect

How To Invert Colors On Windows 10 Easily - MiniTool

colorInvert() Apple Developer Documentation

How to Invert Colors on Chromebook [ Keyboard Shortcut ] - Alvaro

Invert Colors Figma Community

Inverted color on canvas, not on dockers - General Questions

7 Best Free Color Inverters To Invert Colors on iPhone and Android

2022 Guide] How to Invert Colors on iPhone

How to Invert the Colors on a Mac Computer's Display

The Inverted Colors Challenge - Web Design Ledger