• moonlight@fedia.io
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    4 days ago

    That’s interesting, for most people the brain just substitutes in the image of where your eye moves to, so it feels instantaneous. (there’s no noticeable blindness) But you can see throughout the full movement?

    In a similar vein, I never understood having a “dominant eye”. I honestly don’t really understand the concept, I guess most people’s brains will cancel out information from one eye?

    • lagoon8622@sh.itjust.works
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      4 days ago
      • Hold out your arm at arm’s length
      • Make a circle with your thumb and index finger
      • Look through the circle at an object on the other side of the room
      • Now slowly bring the circle back to your eye, such that your fingers never obscure the object, and it’s always centered in the circle

      Which eye did your circle arrive at?

      !That’s your dominant eye!<

      Edit: formatting, I’m a Markdown dumbass

      • AdrianTheFrog@lemmy.world
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        3 days ago

        That’s interesting, I can see both circles but my hand does always go to my right eye unless I force myself to look at the other. That makes sense I guess because my right eye is more focused at a distance. I wonder if that switches though when I look at something close up for a while, because my left eye is more focused then.

      • moonlight@fedia.io
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        4 days ago

        I’ve heard of this test before, and it makes no sense to me. If I focus on a distant object, I see two images of my hand, one for each eye. So I’d have to choose which one to put over the object.

          • moonlight@fedia.io
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            2 days ago

            Not at all, I perceive depth fine.

            If I focus back on my hand, the two images align, and I see both images of the background. It’s just that I’m always seeing information from both eyes.

            If anything, from my perspective it’s everyone else who I would expect to have difficulties with depth perception. You’re only perceiving one eye consciously, (In the binocular overlap region), and the other eye is just used for depth information by your subconscious, is that correct?

            • Ziglin (it/they)@lemmy.world
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              2 days ago

              No the brain does funky stuff mixing the pictures together. If I move something close enough to my face it appears in view twice seemingly semi-transparent. The rest of my visual perception remains unaffected though.

              Are you also constantly aware of your blind spot(s)? (Something that with the single image is completely invisible)

              • moonlight@fedia.io
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                2 days ago

                If I move something close enough to my face it appears in view twice seemingly semi-transparent

                That sounds like what I experience, not just for things very close to my face, whenever my eyes are aligned to something in front or behind.

                But in order to do the dominant eye test, you need to only see one image in the foreground and background simultaneously. So how does that happen unless the view from one eye is at least partially supressed?

                This is one of those things that’s really hard to talk about and describe, but I would love to actually understand it. Also no, I can’t notice my blind spots.

    • Ghoelian@lemmy.dbzer0.com
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      4 days ago

      My eyes still focus automatically (though a bit slow sometimes). But if I want to, I can get my eyes out of focus pretty easily.

      • moonlight@fedia.io
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        4 days ago

        Yeah I can defocus my eyes too, I assume most people can. I’ve never heard of someone being able to see during saccades though.