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Follow these simple instructions and be amazed (Original Post) moobu2 Apr 2013 OP
It's not an optical illusion ... Scuba Apr 2013 #1
amazing! Tuesday Afternoon Apr 2013 #2
Now take all those green pieces of paper out of the wallet or purse zbdent Apr 2013 #3
Cool and lots of fun ! BlueJazz Apr 2013 #4
I love optical illusions. Ron Obvious Apr 2013 #5
Now for a REAL freak out... Flying Squirrel Apr 2013 #6

zbdent

(35,392 posts)
3. Now take all those green pieces of paper out of the wallet or purse
Mon Apr 1, 2013, 08:49 PM
Apr 2013

and send them in a plain white envelope to ...

 

Ron Obvious

(6,261 posts)
5. I love optical illusions.
Tue Apr 2, 2013, 12:16 AM
Apr 2013

They're proof that we see with our brain and not with our eyes. The brain can simply overrule the input from the eyes if it thinks it needs to.

I always thought this hollow mask illusion was interesting:

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