In putting all the odd and sundry health issues that I've had since childhood (way back in the 1950's), I'm actually glad to know that many of them can possibly be attributed moyamoya. I'm thinking now of being born nearly blind in my left eye, doctors wanting to do 'exploratory' surgery for brain tumors until a good eye doctor diagnosed the Morning Glory patten. Apparently rare - I'd never been able to describe it.  I'm interested in knowing if anyone else has this outta sight phenomena.