The Optical Illusions Appreciation Thread

Eponastill

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Well it seems there's a 'Best Illusion of theYear' contest. Loads more here:
http://illusionoftheyear.com/cat/top-10-finalists/2019/
What an amazing website, thank you.
But I have to say - between 'Change the colour' and 'The rotating circles illusion' - well anything anyone ever reports that they've seen, weirdness of any description - surely those two illustrate that we can't call anything we report 'objective'. Those are really crazy.
 
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EnolaGaia

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Going 'cross-eyed' is a more reliable way of seeing the 'hidden image' for me.
I see the transition quite clearly by simply moving my head closer to / farther from the display screen.
 

Yithian

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I see the transition quite clearly by simply moving my head closer to / farther from the display screen.
As a thumbnail it appears to be a normal photo of a woman.
 

Lord Lucan

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The main image is a little pixelated, but you'll get the idea...

opticalillusion.jpg
 

GNC

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I stared at it for a minute and it was still there. How long are you supposed to look at it?
 

Mythopoeika

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I stared at it for a minute and it was still there. How long are you supposed to look at it?
Until your retinas burn out, I reckon.
It didn't disappear for me (and I'm going blind).
 

Yithian

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I stared at it for a minute and it was still there. How long are you supposed to look at it?
It works for me.

First the pinks and blues fade out, and then the yellows expand to take their place before fading out themselves as you lose focus.
 

Comfortably Numb

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Noting this thread, I was reminded of a fabulous documentary I watched some years ago.

I believe this is the one and as I can't see previous mention of it, perhaps of related interest..?

 
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