"I know why most stories don't have a first person main character who is blind," my 12-year-old daughter said the other day, "If you are showing what a person sees and the person doesn't see anything..." She thought a second. "You know what would be a really good writing exercise? To write scenes as if the narrator were blind - you'd have to really focus on the other senses, it would make all of your writing stronger."
Smart girl that Pippi. I may have to try that exercise.