"Watch what happens with these circles. The size of your visual cortex in your brain determines whether an optical illusion 'works' on you or not. The smaller the visual cortex you have, the more you will be 'fooled' by the illusion!"

From http://www.neatorama.com/2010/12/15/vision-and-illusion/ ...

posted by ant 2 years 5 months 1 week ago • 1,353 views • 51 secs