Don't know if anyone else has every observed this. If I close my eyes and look directly ahead, then suddenly look to the right, an amorphous greyish/white blob appears roughly in the direction where I was just looking. There's no blob when I look suddenly to the right with eyes open. I am, of course, thinking...

Potential new reality check!

Look suddenly to the right in an LD (while dream eyes are open) and the blob may appear.

Somebody will have to try it for me, though. I will try it myself if I ever have an LD again, ha ha.