What was Aaron's sickness?
Aaron was described as having worsening (but unpredictable) hearing problems and seeing problems. At one point his mother describes this as "Usher Syndrome II", which it turns out is indeed a genetic defect with exactly those symptoms. So far so good...
But Aaron was also portrayed as having symptoms I'd describe as on the autistic spectrum: his fascination with the minutiae of flight schedules, his fixation on flying models and kites, his unusual synthesis of sensory inputs exemplified by his excitement over the combining colors of the runway/kite/sky/clouds, and his very childlike ("Peter Pan":-) demeanor. While a few anecdotal reports of something vaguely along those lines keep me from immediately writing it off as complete nonsense, it doesn't really add up either.
What's really going on? How do you interpret Aaron's mental states?