"Looked after?" Arthur repeats, incredulous, as if the words were a deliberate insult. "Is that what he's said to you? Christ, I-I-I may be an invalid--" (and he pronounces invalid like a judgement, like it's a failure he can't escape) "--but I don't need constant monitoring."

It doesn't occur to him, because there's nothing quite like the cognitive distortions in the first days of a tailspin, that Nobunaga is probably less worried about his eyes than about his mental state.