Graeme −> Odds and Ends −> Tricks 

Optical Illusions and Other Tricks

Contents of this section:

Black Dot Illusion
Color Name
Elephant Legs
Hanging Patio
Poiuyt a.k.a Blivet, Devil's Fork
Motion
Parallel Lines
Checker shadow illusion

 

In the Black Dot Illusion, there are seem to be black dots everywhere except where you're looking.  But, in fact, there are no black dots.

In the Color Name Trick, there is a conflict between your left brain, which knows the names of the colors, and the right brain, which senses the color.  You will find yourself unable to correctly name the colors!