Related: Interesting perceptual illusion with faces | Mr Angry and Mrs Calm optical illusion | Excellent purple dot illusion | Optical illusion's effects last overnight | More illusions on Boing Boing
Related: Interesting perceptual illusion with faces | Mr Angry and Mrs Calm optical illusion | Excellent purple dot illusion | Optical illusion's effects last overnight | More illusions on Boing Boing