HHmm nice to know also that I am not alone in this as well. When I close my eyes and am in a dark room, I see them, but smaller in number / density than with my eyes open. After images as well. My pixels are red, blue, and yellow, 'colored' snow, that is like looking through some kind of 'film', not "moving", against a "black screen" when my eyes are closed. .I also have astigmatism in both eyes, opposite angles, so when I was young I was still able to see pretty good. I also have floaters as well, they tend to come and go. New ones are nearly black, while older ones are "fuzzy" and not so pronounced, typically look like thin wires, with some curl or twist to them. When looking up into a clear blue sky, I thought could see atoms moving, on my cornea, not atoms really, but something that had "Brownian Motion" to them, random movement of outlined little swirls. Looking at a white screen, I get black dots as well.
Never fear, I've been experiencing this for 40+ years now with no adverse effects (other than the strange looks people give me as I try to describe it.) I don't have issues seeing at night, migraines, or any other eye conditions like glaucoma. I would be curious to correlate the various RX strengths of those of us who suffer (silently or not).
I actually am an optician and have a fairly high myopic RX (between -4.00 and -5.00 for both eyes) and wonder if that could be a contributing factor. NOT being a doctor, I've always figured my optic nerve was either hyper active or like my home computer just has a loose cable connection.
The first time I experienced this I was in the ER and they had just given me dilauded. And larazapam in my IV so I really don't think it was rim a migraine. I have had plenty of them in my life with and with out pain but with all the other markers. It happened again at the eye specialist when he put numbing drops in my eyes. Best of luck getting answers.
1. You need an eye exam by an Eye MD ophthalmologist.
2. The most common cause would be a form of eye migraine or ophthalmic migraine (may or may not have headache).
JCH MD