Hi Carrigon. I dont know if this is similar, but sometimes when i am in bed and i am having really bad eye/face pain i cannot seem to close my eye properly and seem to doze off with it half open. Although i think mine closes properly once i am more asleep.
I never really thought before that others might have it as part of M.E. We seem to have so many strange and diverse symptoms that its sometimes hard for me to keep up with them all. I guess most of the time i just presume i am a strange, sensitive, neurotic freak and leave it at that without questioning
I am sorry you have suffered with this. Dry eye is horrible - if it happens again you could get some liquid tears to helpwith the dry eye.