Rotating Squares: Scan back and forth across the image you will notice that the squares begin to rotate. As soon as your eyes stop moving, however, rotation will cease.
Up and Down: Although it is obvious that the pillars are staying in the same horizontal position, our brain is convinced that they should be moving to the right.
Lilac Chaser: Also known as the pac-man illusion, if you stare at the center cross for a couple seconds you will begin to perceive a green disco going around the circle of magenta discs. After a few more seconds the magenta discs will gradually begin to fade away until all you see a green disc going in a circle around the cross (if you’re having trouble seeing it move closer to the screen).
Static Motion: No, this is not an animated GIF. The image really is static. Notice that when you look at any individual point dead on, it will stop moving.
Scintillating Grid: This is a variation of the Hermann Grid where black dots appear and disappear at the intersections of the gray lines. Interestingly enough, if you cock your head at a 45 degree angle the effect is reduced (but not eliminated).