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Dancing spots before your eyes

eugie links to this cool illusion, and ponders whether it would be perceived differently by people with dyslexia and/or autism. I dunno but it was fun to look at. HOwever now I have pink dots dancing in front of my eyes.



( 8 comments — Leave a comment )
May. 21st, 2006 04:26 pm (UTC)
Excellent illusion. Itwould be interesting to see if dyslexia and/or autism had an effect; also, would it work so well on peple with red-deficiency colour blindness?

Perfectly logical biological explanation behind it. Our eyes have developed to detect our environments to keep us alerted not only to the presence of food but also to the threat of predators, therefore we are programmed to see moving things more easily than stationary ones, especailly in our peripheral vision, which this illusion stimulates. Hence we forget about the unimportant things (the pink dots) and concentrate solely on what our brain determines as the moving target, the blank space which our periphery vision translates as a moving green dot.

If you actively concentrate hard, you can maintain a vague impression of the pink dots long after the time your unfocussed mind would have lost sight of them - the power of the conscious mind overriding the sub-conscious.

May. 21st, 2006 05:34 pm (UTC)
I get the green dot dancing, but the pink dots don't disappear.
May. 21st, 2006 05:52 pm (UTC)
Amazing - I got it all and often these eye things don't work well for me :-) thanks to captainlucy for the explanation too. i wonder what cats would see? (they wouldn't concentrate long enough would they?)
May. 21st, 2006 05:53 pm (UTC)
They're colour-blind, aren't they? So it's just shades of grey I suppose.
May. 21st, 2006 06:06 pm (UTC)
It works fine for me.

There' a spoof one of these where you're meant to stare at it for so long that it reverses direction; it's a spoof because it's actually animated to switch direction after a certain amount of time, whether you stare or not.
May. 21st, 2006 09:40 pm (UTC)
Interesting, having read the instructions it seems fairly easy to observe the effect but it take some effort to sustain.
After a little experimentation I realised I can only do it by angling my head and using one particular eye focussed on the cross.
If I focus both I wind up with both a green and pink set of circles with the green about half a radius below the pink.

I am (according to a test done some years ago) dyslexic.
May. 22nd, 2006 02:53 am (UTC)
I'm both mildly dyslexic and high functioning autistic. It works for me, all the way to just seeing a rotating green dot. So no we don't see it differently.
May. 22nd, 2006 04:55 am (UTC)
Fits with what I would have guessed - that people with moderate to severe dyslexia will see it different, but autism doesn't make a difference (and in this case why should it, really?)
( 8 comments — Leave a comment )

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