To so casually throw out the possibility that he's gone blind (even if it's only temporary, and how can the doctor be sure of that anyway?), only to then say everything is fine? It's erratic behavior, and Jack's starting to get the sense that this guy might have a few screws loose. Not the sort of person you want to be handling your literal brain surgery.

"Do you have a lot of patients? I can't imagine that this is your day job. And how exactly did you and Cassius meet? He wasn't even supposed to exist."

The alarming nature of the situation has helped him push through some of the sedative that had left him hazy at first, and now that he's properly awake (for better or for worse), he's going to ask as many questions as he can get away with.

He's got his power to fall back on too, but he isn't going to use that just yet. Maybe after his skull has been stapled back together.