My English teacher was one eyed , he'd skin a grape and replace the glass eye with the grape. He would get around people that didn't know him and pull the grape out and eat it.
Ah, memories. I had a history teacher with a glass eye. He would get up close to you and his glass eye would stare at you, and his good eye would shift rapidly from side to side. It would freak you out. He was an a*****e, all the kids hated him, and probably the other teachers did too. One day he made a nasty personal remark to me and my reply would have gotten me kicked out of school, but he didn't hear me over the laughter in the room. He was gone after one year.