Blind man demonstrates 'blindsight' phenomenon by navigating obstacle course

http://www.timesonline.co.uk/tol/news/uk/science/article5385633.ece

The man, known only as TN, was blinded by strokes on both sides of his brain which left him unable to see and devoid of any activity in the brain regions that control vision. He uses a stick to detect obstacles, and has to be guided around buildings. However, TN was known to exhibit blindsight, a strange ability some blind people have to detect things that they cannot see.