2 ms·
If I understand correctly, eigengrau is what everyone sees at low light intensities; visual snow includes that but also daytime noise, floaters, streaks, afteri
by isoprophlex 5y ago
If I understand correctly, eigengrau is what everyone sees at low light intensities; visual snow includes that but also daytime noise, floaters, streaks, afterimages.
I see wonky shit all the time, and have just put it down to individual differences in retina & processing sensitivity. But, I have the occasional migraine with aura, AND have used hallucinogens in the past.
So now I wonder how much my visual perception is caused by heredity, and how much by external influences...
- silicon-pizza 5y agoFloaters are particles floating around in your eye's vitreous fluid. I have them, but I only see them in rare circumstances when sunlight is shining into my eyes at exactly the right angle. There is also a disfunction of your cornea, "Fuchs' corneal dystrophy", which can cause glare, halos and streaks, especially at night. I just found this by googling. Wikipedia defines visual snow as a neurological condition, and I don't wish to conflate that with floaters or corneal problems. I can experience afterimages if I look at a strong coloured light for a while, then immediately look at a white piece of paper. I'll see an after image in the complementary colour, because the image is temporarily "burned in" to my photoreceptors. I understand that this is a universal experience. What I'm looking for is different names for each of these distinct visual experiences, if they have different underlying mechanisms.