The right eye of my 12 year old collie seems to be rolled up in her head slightly. Like shes looking up at something. I normally can't see the whites of her eyes but yesterday I noticed after she woke up from a nap that her eye was like this. She was fine yesterday morning this just showed up around 2:30. I have no idea what this could be and am panicking because she's my baby and I couldn't imagine what I would do without her. I know this is a long shot but any ideas what could cause this?