prosopagnosia only got its name in the 1940s, when a couple of soldiers came back from world war ii withead injuries and couldn't recognize their wife or parents. and it took another 50 years for science to discover that people could be born face blind, like jacob hodes, and jo livingston, a retired teacher; ben dubrovsky, a software products designer; and meg novotny, a doctor. if i were your patient, we... you'd spent a long time with me discussing a problem. i come back the next time. >> dr. meg novotny: oh, no, no, no. you walk out to the window at the front and start checking out, and i walk out of the room and i don't know who you are. >> stahl: come on. she relies on patient charts, she told us. but there aren't any of those in ben's office, where lunch in the cafeteria can be tricky. >> ben dubrovsky: i was sitting down at lunch, having a discussion with someone about one of my projects, and the guy across the table gets up from lunch and says, "god, that's really interesting. when you have that meeting, can you invite me? thanks. see you." who is it? i don't know. >> stahl: who