When Bradford looked at a face, he saw a blur. He had access to the same visual information as everyone else (the light entering his retina was identical, as was the retinal image), but he saw it differently because he lacked the knowledge—drawn from experience—to mold the sensory data into a meaningful form. Even after a few months, Bradford was unable to recognize people through vision alone, even when meeting them for the third or fourth time. Instead, he had to rely on acoustic information such as tone of voice.
