Can't say that I have seen any of those, although the other night I tested out my new machine with 10mg and noticed that when looking at the carpet if I moved closer there would be a circular bubble in the center of my vision that zoomed in faster/more than the rest of my vision outside the bubble.
I have a strong feeling that it was something to do with the way my eye works because the center bubble would stay in the middle of my vision no matter where I looked. Usually above 10mg visuals start to move independently regardless of where I turn my head.
'Little spider weaves a wispy web, stumblin' through the woods it catches to my head. She crawls behind my ear and whispers secrets. Dragonfly whiz by and sings now teach it.'