7 ms·

Imagine all you got was noise. Woof. Torture.

by tantalor 2y ago

deleted 2y ago
[deleted]
deadbabe 2y ago
Most of our vision is already noise, we just make sense of it.
- simpaticoder 2y ago
  Even more than noise, the very center of our field of vision is blank, accounting for the retinal nerve, which the brain masks.
  - kelseyfrog 2y ago
    The fovea and the optic disk?
  - anyfoo 2y ago
    I thought it was a spot near but definitely not at the very center of our field of vision, and an ad-hoc experiment to try to find my blind spot seems to confirm that? (It seems to rather be in the periphery.) Or is there another, smaller blind spot dead in the center? That wouldn't fit the retinal nerves though, would it? EDIT: This is the one I meant: "The blind spot in humans is located about 12–15° temporally and 1.5° below the horizontal and is roughly 7.5° high and 5.5° wide." https://en.m.wikipedia.org/wiki/Blind_spot_(vision) https://en.m.wikipedia.org/wiki/Blind_spot_(vision)
  - _carbyau_ 2y ago
    My understanding is the Blind spot is nowhere near the "centre" of our vision. The centre is the bit we use for visual fidelity, or central focus. [0]"The blind spot in humans is located about 12–15° temporally and 1.5° below the horizontal and is roughly 7.5° high and 5.5° wide." It is however quite freaky how well the brain smoothes it over so convincingly! [0] https://en.wikipedia.org/wiki/Blind_spot_(vision) https://en.wikipedia.org/wiki/Blind_spot_(vision)
    - anyfoo 2y ago
      > The centre is the bit we use for visual fidelity, or central focus. When I got my retina imaged (routine, no problems found), I was amazed at how small that spot is when it was pointed out to me. Only a tiny part of the retina is actually seeing in high resolution. Which I guess at least partly explains why everything outside the very center of my vision seems so illegible and somewhat... "unstable" if I stare at one spot for longer.
  - robwwilliams 2y ago
    The optic disk is not all that close to the fovea. The brain does not need to mask the blind spot when both eyes are open.
Fr0styMatt88 2y ago
So one of the things I didn’t expect when I had a detached retina…. no darkness in that eye. The big flashing and swirling blob of light was there whether my eye was open or closed, day or night. I could look at it and identify shapes like when you look at clouds. Many, if not I think most actually blind people don’t see blackness. I’ve read many stories about varying levels of visual ‘hallucinations’. In the absence of input the brain will come up with stuff (https://en.m.wikipedia.org/wiki/Visual_release_hallucinations https://en.m.wikipedia.org/wiki/Visual_release_hallucination...).
- deadbabe 2y ago
  I thought blind people don’t “see” anything at all, not even blackness. Their perception of the world is no more than what you can see out behind the back of your head. Their existence is just a bundle of senses in a void, and the occasional mental imagery.
  - Fr0styMatt88 2y ago
    Yeah should have been more specific there — ‘people that have lost their sight’.
  - ianburrell 2y ago
    Most blind people have some vision. From light, shapes, or colors. Macular degeneration limits the field of view.
- philiplu 2y ago
  I lost vision in my right eye after failed retina detachment surgery damaged the optic nerve. I don’t see blobs of light like you describe, though I do see a dim pattern of swirling lines when I walk into a dark room. Also, weirdly, if there’s a sudden noise while I’m in the dark, I often see a flash of light go off, like an old flashbulb. I’m guessing that’s my visual system somehow rewiring itself to other sensory input.
  - Fr0styMatt88 2y ago
robwwilliams 2y ago
Yes, tinnitus is an auditory version of what could happen. Probably not though.

Imagine all you got was noise. Woof. Torture.

deleted 2y ago

[deleted]

deadbabe 2y ago

Most of our vision is already noise, we just make sense of it.

simpaticoder 2y ago
Even more than noise, the very center of our field of vision is blank, accounting for the retinal nerve, which the brain masks.
- kelseyfrog 2y ago
  The fovea and the optic disk?
- anyfoo 2y ago
  I thought it was a spot near but definitely not at the very center of our field of vision, and an ad-hoc experiment to try to find my blind spot seems to confirm that? (It seems to rather be in the periphery.) Or is there another, smaller blind spot dead in the center? That wouldn't fit the retinal nerves though, would it? EDIT: This is the one I meant: "The blind spot in humans is located about 12–15° temporally and 1.5° below the horizontal and is roughly 7.5° high and 5.5° wide." https://en.m.wikipedia.org/wiki/Blind_spot_(vision) https://en.m.wikipedia.org/wiki/Blind_spot_(vision)
- _carbyau_ 2y ago
  My understanding is the Blind spot is nowhere near the "centre" of our vision. The centre is the bit we use for visual fidelity, or central focus. [0]"The blind spot in humans is located about 12–15° temporally and 1.5° below the horizontal and is roughly 7.5° high and 5.5° wide." It is however quite freaky how well the brain smoothes it over so convincingly! [0] https://en.wikipedia.org/wiki/Blind_spot_(vision) https://en.wikipedia.org/wiki/Blind_spot_(vision)
  - anyfoo 2y ago
    > The centre is the bit we use for visual fidelity, or central focus. When I got my retina imaged (routine, no problems found), I was amazed at how small that spot is when it was pointed out to me. Only a tiny part of the retina is actually seeing in high resolution. Which I guess at least partly explains why everything outside the very center of my vision seems so illegible and somewhat... "unstable" if I stare at one spot for longer.
- robwwilliams 2y ago
  The optic disk is not all that close to the fovea. The brain does not need to mask the blind spot when both eyes are open.

Fr0styMatt88 2y ago

So one of the things I didn’t expect when I had a detached retina…. no darkness in that eye. The big flashing and swirling blob of light was there whether my eye was open or closed, day or night. I could look at it and identify shapes like when you look at clouds. Many, if not I think most actually blind people don’t see blackness. I’ve read many stories about varying levels of visual ‘hallucinations’. In the absence of input the brain will come up with stuff (https://en.m.wikipedia.org/wiki/Visual_release_hallucinations https://en.m.wikipedia.org/wiki/Visual_release_hallucination...).

deadbabe 2y ago
I thought blind people don’t “see” anything at all, not even blackness. Their perception of the world is no more than what you can see out behind the back of your head. Their existence is just a bundle of senses in a void, and the occasional mental imagery.
- Fr0styMatt88 2y ago
  Yeah should have been more specific there — ‘people that have lost their sight’.
- ianburrell 2y ago
  Most blind people have some vision. From light, shapes, or colors. Macular degeneration limits the field of view.
philiplu 2y ago
I lost vision in my right eye after failed retina detachment surgery damaged the optic nerve. I don’t see blobs of light like you describe, though I do see a dim pattern of swirling lines when I walk into a dark room. Also, weirdly, if there’s a sudden noise while I’m in the dark, I often see a flash of light go off, like an old flashbulb. I’m guessing that’s my visual system somehow rewiring itself to other sensory input.
- Fr0styMatt88 2y ago

robwwilliams 2y ago

Yes, tinnitus is an auditory version of what could happen. Probably not though.