In Tanzania, roughly 1 in 200 people have albinism, a condition that affects skin pigmentation and eyesight. The prevalence of a superstition supposing that witch doctors can use the limbs of those with albinism to bring about luck or success has meant that cruel and ritualistic killings are taking place with alarming frequency. People with albinism live in fear and some have sought refuge in leper colonies and education centres for the blind that have more in common with prisons than schools. Along with an American doctor studying the links between albinism and leprosy, I visited some of these places to photograph their inhabitants.