>The bit that is working the eyes atm was designed (via evolution) to work the eyes.
Evolution is a random process, there is no designing, there's no goals.
Evolution is a random process, there is no designing, there's no goals.
There's absolutely a part of the brain that specializes processing visual information, just as there are organs throughout the rest of your body that specialize with other different tasks.
(2) There is a goal: species survival.
(3) The only rule is that whatever aids (2) is a rule for purposes of (1).
Check out Dawkins' The Selfish Gene.
This is not very far fetched. Much of our DNA is used for a short time during development and then effectively turns off for the rest of our life. Taking that DNA away might go unnoticed.