Because your brain uses information from the areas around the blind spot to make a reasonable guess about what the blind spot would see if only it weren't blind, and then your brain fills in the scene with this information. That's right, it invents things, creates things, makes stuff up! It doesn't consult you about this, doesn't seek your approval. It just makes its best guess about the nature of the missing information and proceeds to fill in the scene.
Daniel GilbertThe good news is that going blind is not going to make you as unhappy as you think it will. The bad news is that winning the lottery will not make you as happy as you expect.
Daniel GilbertWe are happy when we have family, we are happy when we have friends and almost all the other things we think make us happy are actually just ways of getting more family and friends.
Daniel GilbertThe human brain is the only object in the known universe that can predict its own future and tell its on fortune. The fact that we can make disastrous decisions even as we foresee their consequences is the great, unsolved mystery of human behavior. When you hold your fate in your hands, why would you ever make a fist?
Daniel Gilbert