I see what you was going for and could be fun for a minute or 2 but the problem is this doesn't live by the "30 secs of fun" rule for most games. The host can't see anything and they have to play the guessing game while their friend try's to guide them. But the host will quicky get bored after staring into nothing for 1 minute. The watcher is just watching and has to explain everything they see till it's just "turn to your left, no turn to your right, dude watch out, zombie next to you! You didn't listen! your just shooting nothing!"
And the host is all like "I don't see anything! everything you say make doesn't help cause I'm shooting air the whole time! What kill me? I shot the whole room! Forget this game, wanna play some Black Ops zombies?"
then boom they quit. I see what you was going for but maybe you should just turn it into a 4 layer coop zombie game or something. Have the eye stuff be like some kind of tool that makes the player blind but shows stuff inside walls or something.