Silhouette illusion

A very impressive illusion created by Noboyushi Kayahara :

In what direction turn the dancing woman ?

The good anwer is : it depends !

If you focus your look, you could change the ballerina rotation direction from clockwise to counter clockwise.

This is your mind which control the direction of the ballerina.

Illusion made for Ophtasurf
Copyright Ophtasurf 2004 ©

Rotating Snakes

Carefully attach the cross in the center of the circle for several seconds.

Two dramatic phenomena will occur :

1) a yellow spot will be formed instead of blue spots.

2) if you do not blink, blue stains will all disappear.



This illusion illustrates the phenomenon of afterimage. Indeed, when the retina is subjected to saturation for several seconds to a light color is the complementary color that appears in the desaturation of photosensitive cells.



© Ophtasurf, 2000-2009, illusion created for Ophtasurf