These are Aesop’s eyes:
This is Aesop’s brain:
Aesop’s eyes are connected to Aesop’s brain by two cords called “optic nerves.” This is a good set-up and it works pretty well for the most part, all things considered, except that at the place where the optic nerves connect to each eye, Aesop cannot see.
Don’t feel too bad for Aesop, though. At the place where each of your optic nerves connects to your eyes, you cannot see, either. And Abraham Lincoln could not see anything at those places on his eyes. And neither Leonardo da Vinci. Why, even Kanye West himself cannot see anything at that place at the back of each eye where his optic nerves connect.
Kanye West! (Please do not tell him I told you this.)