(Note: heavy download!)
Here is an optical illusion to assist relaxing
your eyes. (I suggest that this window be enlarged)
This is phenomenal !! (If you wear glasses, try visualizing without them)
If you take a look at the following picture, let me tell you ... it is not
animated. Your eyes are making it move. To test this, stare at one spot for a
couple seconds , and everything will stop moving. Or look at the black center of
each circle (notice how the center expands and darkens) and it will stop moving.
But move your eyes to the next black center and the previous section will move
after you take your eyes away from it.... Weird