I saw a programme about this on Discovery a few years ago. This woman was asked to copy a drawing of a cat and she only drew one side of it. Then the tester rotated her drawing 180° and she started laughing.So when the visual center on one side of your brain is injured, you don't go blind in one eye. Instead you go blind on one SIDE. I think this is interesting, for people with this unfortunate problem will only eat food on the half of the plate they can see, or they will put makeup on only one side of their face.
Fascinating stuff.