My grandson, Chris, has worn glasses since the age of three. When he was in the first grade he came home one day very distressed. Wanting to find out what was the matter, his mother asked, "Chris, what happened today to upset you so much?"
He answered, "It's not fair -- I'm not allowed to go to the library."
His mother became very concerned and asked, "Why aren't you allowed to go to the library?"
With a tearful reply he said, "Because, in order to go to the library you have to have super-vision, and I wear glasses!"