• jet@hackertalks.com
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    15 days ago

    Every eye has a tiny blind spot near the middle. But your brain makes it disappear and you don’t realize it’s there.

    You can verify this. Draw a dot on a bit of paper. Close one eye, stare at a fixed point, now move the paper around the center until the dot disappears…magic

    What we consider reality, is a synthesis our brain is presenting to us, it is an approximation… realizing that is a real mind blower

    • juliebean@lemm.ee
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      15 days ago

      fun fact: the blind spot is because our optical sensors are installed backwards and that hole is so the optic nerve can pass back through the back of the eye to the brain. some other critters with independently evolved vision systems, such as cephalopods, avoided this particular evolutionary pitfall.

      • murmelade@lemmy.ml
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        15 days ago

        Another fun fact: through that hole there’s also vasculature and capillaries coming through and you can actually see them by looking at a well lit white surface and creating a tiny pinhole with your hand right in front of your eye and wiggling it. Better explained here at around 5:30