It's not only color perception :
Michael Brady quote :
http://www.physlink.com/Education/AskExperts/ae353.cfm
"It is true that the images formed on your retina are upside-down. It is also true that most people have two eyes, and therefore two retinas. Why, then, don't you see two distinct images? For the same reason that you don't see everything upside-down. One of our most remarkable tools - the brain - is hard at work for us at this task."
But how does the brain do that ?? What's physical detail explaination ?
We have 'myopic eye','color-blind' but why we don't have genetic case of "inverted-eye".
Another experts with their quotes :
Paul Doherty with his pin and hole :
http://www.exo.net/~pauld/summer_ins...and__hole.html
What's Going On?
Your cornea and lens makes an inverted and right-to-left reversed image on your retina.
Your brain inverts the image.
You perceive the image to be uninverted and unreversed.
Donald E Simanek with his adding depth to illusions:
http://www.lhup.edu/~dsimanek/3d/illus2.htm
My quote :
What makes inverted and reversed images of the illusions ?
If electron-microscopy apply magnetic-field lens, is there something like "gravity-field mirror/lens" in our mind ? Just speculation.
