Every cloud has a silver lining is not just a popular, thus clichéd, saying. It is a truth. Derek Paravicini was born extremely premature, at 25 weeks. Because of this he was given oxygen therapy to help him develop. The oxygen therapy left him permanently blind and also diminished his mental faculties. He is also autistic. The good news for him is that Derek has perfect pitch and can play the piano like a master. Cases such as this are rare, but not unheard of. People with disabilities such as autism sometimes have abilities that make them a savant. Derek is so blessed.