optical

This footage is amazing!!!!! http://www.youtube.com/watch?feature=player_embedded&v=pc7c-K5xHQ0#at=56

8 Mind-Boggling Optical Illusions:eyes: Test your perception with these wild designs By Olivia Putnal If you’ve ever felt like you go a little cross-eyed after taking a peek at an optical illusion, then you know they can be a pretty intense phenomenon. What your eyes perceive when looking at...