system for enabling a visually impaired or blind person to use an input device having at least one key , comprising : at least one tactile sensor array , in particular a pressure sensor array , attachable to a fingertip of a visually impaired or blind person for acquiring a pressure distribution image of a key slightly touched by a finger of said person when attached to said finger , a pressure distribution image processing and character recognition unit that is connected to said tactile sensor array for processing said pressure distribution image and for recognizing the key label of the touched key and an audio output device that is connected to said unit for outputting and acoustic reproduction of said key label .