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  • Hey guys, let's talk about optical illusions.

  • Optical illusions are a fun way to see the difference between how our brain perceives the world and how the world actually looks.

  • In other words, optical illusions are your brain f***ing up.

  • Illusion 1

  • Now here's a question for you.

  • Which square is darker? A or B?

  • The answer...

  • They're exactly the same color.

  • Wow!

  • The reason your brain thinks there's a difference is in the edges.

  • Your brain pays more attention to sharp edges than to fuzzy ones like shadows.

  • This is the perfect example of your brain doing what it's best at.

  • Breaking down information and filling in the gaps.

  • So even though A and B are indeed the same color value,

  • your brain knows that if that shadow were taken away...B would indeed be lighter.

  • So though your brain ''messing up'', it's actually being pretty smart.

  • It's inferring information that isn't actually there.

  • This... is the rotating snakes illusion.

  • Believe it or not, this is actually a still image...

  • The more your eyes move, the more the circles move.

  • But if you look at the white dot in the center of the circle,

  • the movement will slow down and stop.

  • We don't definitively know why your brain sees motion when there isn't any.

  • Researches are still looking into it.

  • But it's still pretty cool, right?

  • Illusion3

  • So this one is clearly a picture of a...

  • Well that's the thing half of you probably saw a vase and the other half...

  • Probably saw

  • Huh, it's two faces.

  • It all depends on whether you're looking at the black or the white.

  • This happens because your brain is trying to distinguish between a foreground and a background.

  • Even if a foreground and background isn't there.

  • It's a great example of how your brain desperately tries to turn abstract shapes into something that actually makes sense.

  • Sort of like how you can imagine seeing animals in clouds.

  • Now if you'll excuse me...I have things to go blow up!

Hey guys, let's talk about optical illusions.

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B1 US brain optical foreground illusion background vase

Can Your Eyes Beat These Optical Illusions?

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    朱朱 posted on 2014/10/16
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