Unseen is an audio comic created by Chad Allen. Written by a blind person,   with a blind heroine, for a blind (and sighted) audiences. Unseen is the   story of Afsana, a blind assassin living in a chaotic world in which she is   invisible to society. Discounting her abilities is her enemies' gravest   mistake. Unseen is currently available to experience at the Exploratorium   Museum in San Francisco , CA.