The artist Chuck Close, who is famous for his gigantic portraits of faces, has severe, lifelong prosopagnosia. He believes it has played a crucial role in driving his unique artistic vision. "I don't know who anyone is and essentially have no memory at all for people in real space," he says. "But when I flatten them out in a photograph I can commit that image to memory."
That is from a recent NY article by Oliver Sacks, not on-line but gated here. Sacks himself has this condition, as did Jane Goodall, including when she worked with chimpanzees.