Why does the brain do this?

Discussion in 'Biology & Genetics' started by visceral_instinct, Jun 25, 2009.

  1. visceral_instinct Monkey see, monkey denigrate Valued Senior Member

    Messages:
    7,913
    You know when you are in near or complete darkness and you see millions of little neon lights?

    Why does the brain do this? It doesn't create 'white noise' with your hearing or sense of touch, so why vision?
     
  2. Google AdSense Guest Advertisement



    to hide all adverts.
  3. CapsOwn Registered Senior Member

    Messages:
    20
    No. I've never had that happen to me. That's interesting.
     
  4. Google AdSense Guest Advertisement



    to hide all adverts.
  5. visceral_instinct Monkey see, monkey denigrate Valued Senior Member

    Messages:
    7,913
    Are you sure?

    Is it that you don't have it at all, or you just don't notice it, because your brain sees it as normal, and ignores it?
     
  6. Google AdSense Guest Advertisement



    to hide all adverts.
  7. RubiksMaster Real eyes realize real lies Registered Senior Member

    Messages:
    1,646
    If you are talking about visual snow, I have it too.

    I can just barely see even in lighted rooms. The only time I can notice it in day-to-day life is when staring at a completely white surface, but in dark spaces it's apparent. It looks like the fuzz on a tv screen, but the "particles" are much smaller. Also, mine is in grayscale, but you seem to have colors.

    I think it's just caused by extra electrical activity in the visual region of your brain. Either that or most people just filter it out and don't notice it. I always remember having it, but I don't think I ever paid any attention to it until I started having migraines with visual auras.
     
  8. takandjive Killer Queen Registered Senior Member

    Messages:
    2,361
    I remember reading a book years ago that this is a byproduct of hypersensitive vision. (Oddly enough, it's a book about autism. How 'bout that?) I see them as well.

    Question, VI: Is your vision 20/20 or better?
     
  9. CapsOwn Registered Senior Member

    Messages:
    20

    Nope, not at all. I do sometimes get afterimages, but never anything like that.
     
  10. iceaura Valued Senior Member

    Messages:
    24,074
    Lots of people hear random little hisses and noises when it's completely quiet, generated by various aspects of their hearing equipment.

    Some even have constant "ringing" or similar sounds audible all the time.
     
  11. visceral_instinct Monkey see, monkey denigrate Valued Senior Member

    Messages:
    7,913
    Yes

    Please Register or Log in to view the hidden image!



    I also have hypersensitive vision; I wear dark glasses everywhere unless it's late evening or very overcast, my eyes are really delicate.
     
  12. takandjive Killer Queen Registered Senior Member

    Messages:
    2,361
    I think they're just air particles in front of your eyes. Again, this was a book about autism, so maybe not the best book for vision advice.

    Please Register or Log in to view the hidden image!

    Good for you on wearing sunglasses. You won't end up with cataracts!

    I remember noticing them when I was about five and asking my mom who thought I was ill. Always have seen them. I've made it this far with them. The good news is you'll live to be at least 24.

    Please Register or Log in to view the hidden image!

     
  13. Stryder Keeper of "good" ideas. Valued Senior Member

    Messages:
    13,101
    What you see in complete darkness is actually traces of light ranges that we can't fully pick up on (They border our visual range). You'll notice the colours are red (Infrared), Green and a slight amount of Blue. Most of these colours can be used by the right equipment for night vision. You have to remember although you can't see the photons in that spectrum, it doesn't mean you can't see the output of their collisions with surfaces

    Please Register or Log in to view the hidden image!



    I wouldn't suggest however trying to run around in a dark room assuming you can see.... you might hurt yourself. Although it's highly possible that after a while you'd get use to low light levels.
     
  14. visceral_instinct Monkey see, monkey denigrate Valued Senior Member

    Messages:
    7,913
    I just put my hand over my eyes to make everything go black to see the colours.

    They were mostly red and UVish blue (you know that blue that borders on indigo like you see from UV lights), and some pink and green.
     
  15. Randwolf Ignorance killed the cat Valued Senior Member

    Messages:
    4,121
    It reminds me of the "floaters" that people see. The stories abound about kids seeing through a microscope for the first time and diagramming these little critters. Turns out they are blood cells or something floating in front of the cornea or in the vitreous fluid maybe... (read about it a long time ago)


    OK, looked it up, discount the cornea part, floating in the vitreous fluid is right. While I was there:

    http://www.allaboutvision.com/conditions/spotsfloats.htm
    Except your not an "older person" - maybe they meant "older soul".

    Please Register or Log in to view the hidden image!



    Anyway, try googling it, probably they have some explanation... "They" always have some explanation.

    Please Register or Log in to view the hidden image!

     
  16. visceral_instinct Monkey see, monkey denigrate Valued Senior Member

    Messages:
    7,913
    I don't see flashes of light though. Just 1,000,000,000,000,000,000,000,000,000,000,000,000,000 or so little neon dots when it's dark, or when I look at a dark surface.
     
  17. RubiksMaster Real eyes realize real lies Registered Senior Member

    Messages:
    1,646
    I have visual snow in the dark, as I mentioned earlier. In the daytime I can only really notice if I look at a bright surface, or if I see a sharp delineation such as black against white. In the latter case, it looks almost like jpeg artifacts, but more subtle, and moving very quickly.

    I also have quite a few floaters in my right eye. Also, If I stare at a bright surface I can see the white blood cells in my retinal blood vessels. I think more so than most people (see blue field entoptic phenomenon, but for me it's not limited to blue surfaces). I also see a lot of afterimages. I think I get more than most people, but I really don't know, because I've never seen through anyone else's eyes.

    The flashes of light associated with floaters are very different than the flashes VI is talking about. Those flashes are more like a well-defined spot of very intense color (frequently just a grey or beige) that flashes for a duration of between half a second to over an hour.

    A lot of my visual phenomena started after I started getting migraines. I think mainly the problem is that I started paying too much attention to my vision because of the intense visual auras that accompany my migraines, and I let the anxiety get the better of me.
     
  18. takandjive Killer Queen Registered Senior Member

    Messages:
    2,361
    It's hypersensitive vision. My retinas are fine, and I see them.
     

Share This Page