Well, eye infections can itch a lot, they can be contagious, they come with that lovely white stuff around the eyes and sometimes running down the cheek, and the eyes have to have drops or salve. It's real fun. Oh and often when waking up, the eye is glued shut. Plus the pus that has stiffened over night is hard and it hurts to wash it off.
I don't know. Maybe a cyst.
Cancer or diabetes?