In any other circumstance, Crowley would be over the moon for Aziraphale to forcefully yank him into his bedroom. And he does stop to weigh his options about mentioning that he can read lips.

He decides that maybe, for now, he can keep that to himself.

"Sss'okay, Aziraphale," he says, and now that he can focus on calming Aziraphale's perpetual nervous energy, he can calm his own. "You can sign, or write letters in my palm. Are you going blind...?"

While wandering around looking for Aziraphale, he'd bumped into other guests, all with either a loss of hearing or loss of sight. It seemed if Aziraphale needed his glasses for anything besides looking smart, that his eyes were going.