Optical illusion: Girl in inverted colors

1. Stare at the red dot for 30 seconds. 2. Look at a white wall and start blinking.

Fun with Ambiguous Images - Art of Play

Afterimage: An Eye-Boggling Optical Illusion

10 Cool Optical Illusions to Try

Afterimage: An Eye-Boggling Optical Illusion

Your Brain Develops The Negative – Webvision

7,682 Optical Illusion Stock Photos - Free & Royalty-Free Stock Photos from Dreamstime

After-image illusion

After-image illusion

portrait of young girl teenager surreal inverted blue colours Stock Photo - Alamy

The Best Optical Illusion Art on the Internet

These Double Ombré French Nails Are an Optical Illusion

5 Optical Illusions To Test Your Personality: Interesting QUIZ

This optical illusion tricks your brain into seeing colour on a black and white image

Optical Illusion: What you see first reveals your deepest fears?