I don't know how much of Tav's condition filtered through the rumor mill [she assumes some, since keeping a rifter routinely under guard would be hard to hide and because he'd made some ill-advised comments by sending crystal], but his condition didn't really have a physical component as far as I'm aware. It was a magical effect. Still, you could talk to him if he's willing to discuss it with you. Tangentially related, maybe.

I don't think I know of any other ... Well, maybe a stretch, but I remember reading a copy of an Inquisition report from before my time. Reports of an artifact causing non-mages to see through the Veil to the Fade involuntarily. Scant on details, but I can earmark it for you if you think it's useful. Unfortunately, I don't think we're still in contact with anyone who experienced it, or at least not close contact.