Mathematical vision scientists Hitoshi Arai and Shinobu Arai created this unique wreath image in 2011.  If you focus your eyes on the red dot in the center of the wreath and move your head toward your monitor and then away from it repeatedly, you will notice that outer portion of the wreath appears to move […]

This figure looks like a warped spiral made up of white and black squares on a gray background.  If you examine it more closely, however, you will find that it is actually made up of four concentric circles.  This illusion was first described by Baingio Pinna and Richard L Gregory in a 2002 article titled […]

Look at the black dot in the center of this image and move your head closer to your screen and then back again.  Do the outer circles appear to be moving? This illusion, known as the Pinna illusion, was the first visual illusion to show a rotating motion effect.  It was discovered by Dr. Baingio […]