Was he actually stalking this with an open mind? Wasn't he supposed to say she was having an episode? That's what the bright white room is for, people who see things and hear them ... the things that aren't there. They can't be real. They shoved the fact that nothing is real down her throat for agonizing after agonizing year.
With eyes vast as the expanse of the uncharted territories of the moon, miniaturizing the brown in them, they could have very well been mistaken for bleeding out, blending in with whatever faint light there was, the white of her wide eyes. She was staring up at him unable to determine if he was entertaining her or being serious... that was his serious look, wasn't it?