This morning when I woke up and opened my eyes, my whole bedroom was covered in a spider web type pattern. The room was fairly dark but not pitch black. It was an overall pattern covering walls, ceiling, and floor, like long, skinny leaves or thick spiderwebs. After a couple of seconds it went away. This has happened in the past, though not often. Is it something to be concerned about? I'm 49 and in good health, do not even wear glasses except for reading.