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  • Your eyes help you see the world, but you can't see this dot.

  • No, seriously. If you close your left eye, stare at this cross here with your right eye,

  • and slowly move your head towards or away from the screen,

  • the dot will disappear, revealing the exact location of your blind spot.

  • The cells at the back of your eye transform light into signals that are sent to your brain.

  • But they are missing right here, because this is where nerves and blood vessels connect to the eye.

  • So anything at that point in your vision, you can't see, aka your blind spot.

  • If we add a line through the image and you try again,

  • you'll notice that your brain fills in information and makes you think the line is continuous

  • instead of there being a hole in your vision.

  • You also can't see all twelve of these black dots at once for a similar reason.

  • Go ahead and try.

  • Chances are you'll only see a fraction of them at once.

  • The exact point your eye looks at is focused,

  • but your peripheral vision isn't great,

  • and so your brain often makes assumptions for what's there.

  • Because of the consistent gray line pattern,

  • your brain assumes the rest of the image is just like that and misses the black dots

  • until you look directly at them.

  • These two rectangles are flashing at a phase with each other, right?

  • How about now?

  • For most, the rectangles will now seem to be flashing at the same time in phase, but they aren't at all.

  • And yet, if we move these shapes beside them just a few pixels,

  • you'll begin to see them out of phase again.

  • The surrounding area has a direct impact on how you see and perceive things,

  • even if the result isn't correct.

  • Not convinced?

  • Look at these flashing squares.

  • Except, what you may not have seen is that the middle square isn't flashing at all.

  • If we remove the outer square, we see it for what it is: a solid color.

  • Now, try reading the sentence inside it.

  • Did you catch the extra word?

  • Your brain doesn't always notice mistakes like these because it doesn't affect your comprehension of the sentence,

  • and your brain will prefer to act quickly rather than to be perfectly accurate.

  • Try staring at the middle dot in this illusion.

  • When the picture isn't moving, the colors are clearly changing quickly,

  • yet when the image starts rotating, the color change either seems nonexistent or much slower.

  • Our eyes and brain have evolved to see,

  • but our vision makes assumptions based on learning, memory, and expectation.

  • And all of these illusions take advantage of this adaptation.

  • It's an advantage to have rapid information-processing,

  • so instead of taking in every bit of detail to be 100% accurate,

  • which would cause a brain-overload,

  • your brain makes assumptions.

  • This faster perception allows for faster reflexes and faster conscious and unconscious decisions,

  • an integral aspect of human nature, much like this halo,

  • if you stare at the center spot for long enough, the brain will simply make it disappear.

  • It makes an assumption that the information is unchanging or unimportant,

  • and as a result, you can't see it.

  • Love tricking your brain with illusions?

  • We've put together a playlist of our favorite ones that you can watch by clicking the screen.

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Your eyes help you see the world, but you can't see this dot.

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B1 US brain flashing eye vision blind spot phase

You Can't See This (MIND TRICKS)

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    Tim posted on 2016/12/05
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