I'm working on a story (present day, set in/around Hollywood) in which a celebrity character is kidnapped and held captive by a deranged stalker type character. After several almost-successful escape attempts, the stalker uses some means to render his captive blind, to prevent his trying to escape anymore. I'm not really picky about what that means might be (chemical probably), though it'd be better if it's something that at least has the potential to eventually heal after he's rescued and treated medically. It's okay if they're not SURE if it can heal or not, too, and it's okay as a last resort if the blindness is permanent, though I definitely prefer something that he has a chance of recovering from.
But here's where it gets tricky for me - I also need something that would leave his eyes looking more or less normal, even if he can't see out of them. And that's the detail I can't seem to find. I'm actually having a hard time coming up with ways to word this kind of a search that give me the information that I need. Can anyone help me with this? :)