The mind's eye...

This one is kinda neat. Stare at the center and move your face toward and away from your screen. The circles move!...
 
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An Optical Illusion

If you focus your vision on the small dot at the center of the rings in the figure below, and move your head alternately toward and away from the picture, the rings of symbols appear to rotate slightly in opposite directions.
 
My kids have a couple of those books, I've never been able to see the pictures in them.:(
 
I've never had a problem unless it was made poorly. I just focus deeper and deeper into the patern which basically diminishes the overall focus...
 
It's hard to explain how to do it also. With me, I just cross my eyes a little. Once you know how far to cross your eyes, it becomes easier to do it.
 
PuterTutor said:
My kids have a couple of those books, I've never been able to see the pictures in them.:(

me neither. all they do is make my eyes water.
 
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