A woman I worked with had a son born with Aphasia. He cannot and will never be able to understand language. He cannot talk, he cannot write or sign. He does not understand language spoken to him. His brain just cannot put it together. He can point at ice cream, but cannot understand would you like ice cream. But, if you point at the ice cream he will understand.

We know there are changes in the eye. So, their perception might be different. Remember those images that became popular about 20 years ago. To most people it just looks like a repeating pattern. I can see the three dimensional image that is encoded within it. It is not something I learned, I just saw it pop out while other people were saying what are you talking about???

http://www.wallsave.com/wallpaper/10...hd-250374.html

For example, this is a small helicopter, like the ones they use for local traffic.

What do you see?