Researchers observe an astonishing case of multiple personality: the brutality experienced by this woman in her childhood was so extreme that her brain developed several personalities.
She also went blind:"It was a cortical blindness in which the eye and nerve are intact, but the transmission of information to the visual cortex of the brain is interrupted.
After some time she developed a new personality, but this one could suddenly see while the other personalities were still blind.
This incident allows an insightful look at how the brain can organize different personalities.