Sargy Mann is a painter. He had a very successful and productive career until 1979 when he became blind in his right eye and partially sighted in his left. Over the next eight years, doctors operated a dozen times on his left eye but by 1988 he was registered blind. But that didn't stop him wanting to paint, so he went to his studio and picked up his brushes. What followed was one of the strangest sensations of his life, he says, 'I saw the canvas turn blue as I put the paint down'.