BAMAKO, Mali (AP) — Amadou Ndiaye meticulously ran his fingers across bumps in a piece of paper, making sense of the world he can no longer see. Two hundred years have passed since the invention of braille, the tactile writing system that has transformed the lives of many blind and partially sighted people by offering a path to literacy and independence. “Braille helped me live my life," said Ndiaye, a social worker in Mali who lost his eyesight as a child.