He has never even had a "lazy eye" before not even when tired. Woke up totally cross eyed on Friday morning. NHS Direct said to go to A&E to get it checked out, who kept him in for 12 hours to observe to ensure it was not being caused by any pressure from the brain - no scan but they seemed happy that it wasn't, he is totally healthy and happy in all other ways, eating, playing, not clumsy, still dexterous etc. Seems to be getting worse though, and DH and I are worried....any ideas?