I get this SO badly
I don't have to rub my eyes or anything I just move them and see white flashes, green dots, yellow dots, blobs, colour, etc but only in the dark. I still have floaters and stuff though in light. My visual snow is also more extreme in darkness.
I went to the eye doctors 2 weeks ago I was fine I got a photo of my optic nerve and it was fine. No glasses nothing
I guess it's just one of those things don't worry