Blind in one eye

He phones up for a repeat of his pills. A quick look at his notes suggest I should check him out. He turns up. "While I am here could you take a look at my left eye. It's gone a bit funny. I can 't see much out of it." I cover his left eye, put my other hand up and ask him how many fingers he can see. When he tells me "none", I wiggle my fingers. He can see movement. It's been two weeks and he is totally unfazed by this happening. Takes all sorts does it not.