I see; I had a feeling that might've been the case. :| I think it would help if you would push yourself to do that once, even if for just a few seconds, with your eyes wide open. Nothing will happen. You will be fine. So, when you feel a bit braver, you could do that for yet more seconds, working your way up to minutes, and eventually, hopefully, learning to sleep in that position. It's like, facing your fears, kinda thing. Do you have a psychologist or psychiatrist? Is there nobody that could help you with this? Even if it were just someone, perhaps a family member, to sit in the room with you, while you attempted this; you might feel utterly foolish, but it might help.