4 ms·

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.

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.