Optical illusion: Girl in inverted colors

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

These Double Ombré French Nails Are an Optical Illusion

Optical illusion pictures: All the best mind-bending images from around the world

50 Optical Illusions That Will Blow Your Mind - Parade

This Optical Illusion Will Tell You If You Have Trust Issues

12 optical illusions that show how colour can trick the eye, The Independent

5 Color Illusions that Colorists & filmmakers should be familiar with by Hector Berrebi - ProVideo Coalition

Ambiguous image - Wikipedia

Bizarre optical illusion tricks you into seeing brunette woman on the wall using genius 'brain hack

The Best Optical Illusion Art on the Internet

This Eerie Optical Illusion Will Make You See A Face On A Blank Wall

I can't see optical illusions. What's wrong with my brain? - Quora

Incredible optical illusion means you'll see this black & white picture look very different