Ghassen Ben Brahim

1. Introduction Braille is the universal form of literacy for the blind and visually impaired. Braille bridges the communication gap between the visually impaired and their surroundings. It is the only textual representation that the blind and the visually impaired can understand. A major challenge faced by the blind and the visually impaired is their need to learn the braille language to be able to read and learn in general.