3D printing has shown itself to be a great resource for the visually impaired. The technology has been used to print Braille onto commercial packaging, create 3D tactile pictures for children's books, and it has also led to the development of Linespace, which is like an interactive tablet for the visually impaired. The device consists of a drafting table onto which a 3D printer head extrudes raised lines of PLA according to user commands, and it's showing great promise in helping blind people to read maps, diagrams, and other complex visual data. Read more at 3DPrint.com: http://3dprint.com/118793/3d-printed-linespace-tablet/