A German girl born with a missing right hemisphere of her brain has baffled her doctors by having normal vision.

http://news.bbc.co.uk/1/hi/health/8159631.stm

“[MRI] Scans on the girl showed that the retinal nerve fibres carrying visual information from the back of the eye which should have gone to the right hemisphere of the brain diverted to the left.

Dr Lars Muckli, of the university’s Centre for Cognitive Neuroimaging, working with German colleagues from Frankfurt, said: ‘The brain has amazing plasticity but we were quite astonished to see just how well the single hemisphere of the brain in this girl has adapted to compensate for the missing half‘.”

This remodelling would have occured very early in-utero.