• TachyonTele@lemm.ee
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    2 months ago

    Basically, yes. Our eyes capture the light that goes into them at 24 frames per second (please correct me if I goofed on that) and the image is upside down.

    Our brains turn those images upright, and it also fills in the blanks. The brain basically guesses what’s going on between the frames. It’s highly adapt at pattern recognition and estimation.

    My favorite example of this is our nose. Look at you nose. You can look down and see it a little, and you can close one eye and see more of it. It’s right there in the bottom center of our view, but you don’t see it at all everyday.

    That’s because it’s always there, and your brain filters it out. The pattern of our nose being there doesn’t change, so your brain just ignores it unless you want to intentionally see it. You can extrapolate that to everything else. Most things the brain expects to see, and does see through our eyes, is kind of ignored. It’s there, but it’s not as important as say, anything that’s moving.

    Also, and this is fun to think about, we don’t even see everything. The color spectrum is far wider than what our eyes can recognize. There are animals, sea life and insects that can see much much more than we can.

    But to answer more directly, you are right, the brain does crazy heavy lifting for all of our senses, not just sight. Our reality is confined to what our bodies can decifer from the world through our five senses.

    • calabast@lemm.ee
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      2 months ago

      We definitely are seeing things faster than 24 Hz, or we wouldn’t be able to tell a difference in refresh rates above that.

      Edit: I don’t think we have a digital, on-off refresh rate of our vision, so fps doesn’t exactly apply. Our brain does turn the ongoing stream of sensory data from our eyes into our vision “video”, but compared to digital screen refresh rates, we can definitely tell a difference between 24 and say 60 fps.

      • TachyonTele@lemm.ee
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        2 months ago

        Yeah it’s not like frames from a projector. It’s a stream. But the brain skips parts that haven’t changed.

      • Ekky@sopuli.xyz
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        2 months ago

        I think i read that fighter pilots need to be able to identify a plane in one frame at 300 fps, and that the theoretical limit of the eye is 1000+ fps.

        Though, whether the brain can manage to process the data at 1000+ fps is questionable.

        • Fester@lemm.ee
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          2 months ago

          I’m using part of this comment to inform my monitor purchases for the rest of my life.

        • nimpnin@sopuli.xyz
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          2 months ago

          Both of these claims are kinda misguided. The brain is able to detect very short flashes of light (say, 1 thousandth of a second), and other major changes in light perception. Especially an increase in light will be registered near instantly. However, since it doesn’t have a set frame rate, more minor changes in the light perception (say, 100 fps) are not going to be registered. And the brain does try to actively correct discontinuities, that’s why even 12 fps animation feels like movement, although a bit choppy.

      • Caveman@lemmy.world
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        2 months ago

        I would believe it if someone told me that an individual rod or cone in the eye was 24fps but they’re most likely not synched up

    • Reyali@lemm.ee
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      2 months ago

      If you want a fun experiment of all the things we see but don’t actually process, I recommend the game series I’m On Observation Duty. You flip through a series of security cameras and identify when something changed. It’s incredible when you realize the entire floor of a room changed or a giant thing went missing, and you just tuned it out because your brain never felt a need to take in that detail.

      It’s sorta horror genre and I hate pretty much every other horror thing, but I love those games because they make me think about how I think.