And if DS cannot turn his eyes upward intentionally, maybe never will be able to (as a permanent post-surgical limitation; he normally turns his head up to direct his eyes), to do something like look at the top of his head in the mirror to see the part in his hair, what do we do to work around that?
A mirror mounted at a diagonal above/behind him in the bathroom (or his room), so he can see the reflection of the top of his head looking straight at the regular mirror.
I don't know the answers to your other questions, but that sounds like one to handle pragmatically.
