According to the New York Times:
Jorge Luis Borges — who had gone blind when he was in his 50s — did his [self-portrait] in the basement of the Strand, using one finger to guide the pen he was holding with his other hand.
“His translator brought him in,” Mr. Burt Britton [the owner of the drawing] said. “The portrait is perfect, but what I most remember was escorting him upstairs to the main floor, where it became clear he was listening to the room, the stacks, the books, and him telling me, ‘You have as many books as we have in our national library.’ ”