This is called the Ebbinghaus illusion. It’s an optical illusion of size perception.

The pink circles are exactly the same size. In the first image I show the effect. In the second I show the same image, modified to reveal the equal size.

https://en.wikipedia.org/wiki/Ebbinghaus_illusion

#EbbinghausIllusion #OpticalIllusion #Brain #Science #Perception