Does anyone here wake up in the middle of the night seeing a dense film of black spots in their field of vision here? It's like I wake up seeing black smoke a few times a night, usually early morning when I have most of my REM sleep, and it goes away after a few seconds. I also usually feel a bit lightheaded and goofy when I wake up to this. Sometimes in the middle of it all I see a black geometrical shape (looks a bit like a digital spider) rotating towards me and dissipating. First time it happened it freaked me out and I tried to catch it in the air. I don't think it's sleep apnea because I don't wake up gasping for air from this. I've also had a sleep study done and they said I didn't have sleep apnea.