Odd dark "spot" in field of vision when I tilt my head
Well, just as the title of this thread implies, I woke up to seeing an odd spot in my left eye's upper-middle field of vision when I tilted (not turned) my head either left or right; tilting forward or backwards seemed not to have affected it. What was odd about it was that I felt no awkward pressure in my eyeball or surrounding area. I did not feel dizzy or nauseas. I did not feel any pain. The spot was simply there when I tilted my head sideways. Also, the more that I tilted my head, the larger the spot became. As for what the spot looked like, all I can say is that it was a dark spot that blocked my vision beyond it.
Any suggestions to point me in the right direction would be greatly appreciated as I am unable to find a satisfactory result through search engines.