Hi. I'm online and happy to answer your question today.
Tell me a little bit more about this blindness you experience when sleeping. Is it complete, lights-out blindness in both eyes? How long does it last?
Do you have any medical problems or take any medication?
I see that you are offline. I'll switch over to the Q&A system. This system works a lot like 'text messaging' but an email is sent to each of us anytime something is posted to this thread. We can continue to work on your question there..... :)