It might also be visual snow; it looks like the two main distinctions are whether it goes away in bright light (visual snow doesn’t, CEV does), and whether or not you can ignore it if sufficiently distracted. Most of the time, I don’t see it, but whenever it’s dark enough, and whenever I think about the CEV, it shows up, which leads me to believe mine is CEV and not visual snow.
Of course, I’m not an expert on [insert pertinent field here], so I wouldn’t be surprised if I’ve misdiagnosed myself.
