Can't open eye in lucid dream state
I have no idea what this means, but ... during a recent dream, I had a problem opening my left eye. I could look around the apartment in the dream with my right eye, but my left eye just wouldn't open.
It turns out that back in bed, I was sleeping face-down, with the left side of my face crammed into the pillow. On the rare occasions I sleep face-down, because of a problem in my neck related to an accident, I try to keep my head and neck as straight as I can. As a result, either the left or right side of my face ends up bearing the weight of my head. On this night it was the left side of my face, and apparently as a result of this, I couldn't open my left eye in the lucid dream. I knew about the problem during the dream, but only realized the cause when I woke up.
What does this mean? I don't know for sure, but the obvious guess is that during lucid dreams there's still a connection between the physical body and what you can do in the dream state. If you can't open your physical eye, or perhaps when there's pressure on it, you can't open it during a lucid dream. I think I knew about this problem from sleeping on an arm (and having the arm fall asleep), but I never really thought about it until a few nights ago.
I thought this was kind of cool, because I would have never known about this if I just slept on my back, or one side or the other.