CCW or CW ... Which?

[palani]

http://www.allproudamericans.com/paimages/Spinning-Silhouette-Optical-Illusion.gif

And if you can only see one rotational direction what makes you trust your vision with more important issues?

Hint ... it helps to focus your vision to a place 3-4 inches to the left of the image ... catch it with your peripheral vision.

[Dogman]

You can stare at the shaddow of the outside moving foot to make it change, almost at will.