Circles Rotating in Different Directions (IMAGE) Yale University Caption In this stationary image, viewers should see the circles rotating in different directions. The effect is particularly pronounced when the viewer's eyes move or blink. Credit Illusion credit to A. Kitaoka; illustrated by R. Tanaka Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.