"Rollers"

Rollers appear to rotate without effort. On the other hand, they appear to rotate in the opposite direction when observers see this image keeping blinking.

"Rotating rays"

"Rotating snakes"

"Rotating snakes"

Phantom Dots / Blinking Dots

Classic Illusion. The dots are all white, but appear to change color.

"The Spins" Illusion

Another example of an "Anomalous motion" optical illusion: a static image that is perceived to have some form of motion.

Flag Illusion

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In and Out -- Optical Illusion

Look at the center of the above image, while moving your head closer and farther away from your monitor.