I like that everyone's getting all autobiographical with this one. Seems like we were all properly paranoid as kiddos.
My family's living room had a couch with large window at it's back facing our backyard. I'd stay up and watch TV and always feel eyes at my back. At first it was crocodiles looking in my window, then simply intruders, then just the idea of something menacing watching.
The bifocals are completely historically accurate.