Optical
illusions / Color illusions

Look the red squares.
Do they look much closer to you?
(Not everybody can see it).

Do you see the dog?

Can you see the small BLACK circles
(in the middle of the the white lines) ?
Well, they are not really there !

Can you see the small RED circles
(in the middle of the the black lines) ?
Well, they are not really there !

There is actually no movement in this image.
It moves because of the colors.

Do you see the two shades of green above?
There is actually only one shade of green.

Black spots seem to appear and disappear very fast at the intersections

Stare at the center of the circle, and move your
head back and forth towards
the monitor and away from it.
The circles appear to slide back and forth!

Hold you head still and use your mouse to move the scroll bar up and down.