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  #1  
Old 10-27-2005, 08:12 AM
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Someone please explain this

From: http://www.patmedia.net/marklevinson/cool/cool_illusion.html

If your eyes follow the movement of the rotating pink dot, you will only see one color, pink.

If you stare at the black + in the center, the moving dot turns to green.

Now, concentrate on the black + in the center of the picture. After a short period of time, all the pink dots will slowly disappear, and you will only see a green dot rotating if you're lucky!

It's amazing how our brain works. There really is no green dot, and the pink ones really don't disappear. This should be proof enough, we don't always see what we think we see.

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Old 10-27-2005, 08:25 AM
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Thats cool.
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Old 10-27-2005, 09:16 AM
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thats pretty cool, rather odd, i looked at it and then checked quick to make sure that it wasn't the picture changing!! cool, i like optical illusions
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Old 10-27-2005, 09:22 AM
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http://www.michaelbach.de/ot/
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Old 10-27-2005, 10:24 AM
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I only saw pink at first. Once I saw the green, I couldn't get rid of it. I kept seeing a green dot moving in a circle over the pink dots, even when I didn't look at the center. What is the explanation?
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  #6  
Old 10-27-2005, 10:39 AM
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Quote:
Originally Posted by kerry edwards
I only saw pink at first. Once I saw the green, I couldn't get rid of it. I kept seeing a green dot moving in a circle over the pink dots, even when I didn't look at the center. What is the explanation?
There's no explanation. Esse est percipi.
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Old 10-27-2005, 11:47 AM
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Quote:
Originally Posted by kerry edwards
I only saw pink at first. Once I saw the green, I couldn't get rid of it. I kept seeing a green dot moving in a circle over the pink dots, even when I didn't look at the center. What is the explanation?
You are defective? Just teasing. Hey how's your neck/spine doing? any pain or has it fully recovered?
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  #8  
Old 10-27-2005, 12:01 PM
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If you stare at a sharp black-and-white pattern for an extended picture of time, then stare at a blank wall, you will see the "negative" of the pattern you were originally staring at.

Green seems to be the "negative" of pink. When you stare at the center of the circle for a while, then look at another part of the screen, you will see a circle of green dots - this is the negative image of the pink dots.

When a pink dot turns off, you will see its negative image (green) shortly afterwards. As the pink dots sequentially turn off and on around the circle, you therefore see a green dot circulating.

I have no explanation for the pink dots disappearing ... maybe it is Visine ...
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  #9  
Old 10-27-2005, 05:52 PM
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The pink dots appear to dissappear for exactly the same reason that the green dots appear to appear.

This is a very old trick, but I've never seen this presentation. I have seen static images with instructions to stare for thirty seconds, then stare at a neutral background to see the negative image.

When light hits the receptors in your retina, a chemical reaction takes place, which depleats an enzyme while sending a message to the optic nerve.

This enzyme slowly rebuilds itself, and our brains are wired so that we don't see this happening. In this example, the enzymes in the red and blue receptors are depleated. You see background because your brain fills it in, when you're actually seeing pink. When the pink disappears, the green receptors get much more activity, with their non-depleated enzymes, than the red or blue.

This enzyme buildup and depletion with light reception also causes your retina to become much more sensitive to light after exposure is minimized, well after the iris is completely opened.

I'm not a doctor. The above is probably all wrong. I learned this in high-school biology classes, a long time ago in a galaxy far, far away.

[edit to correct spelling]
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Old 10-27-2005, 11:21 PM
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Howdy All,
I closed one eye and also crossed my eyes.
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  #11  
Old 10-28-2005, 02:24 AM
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Cheater.
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  #12  
Old 10-28-2005, 07:51 AM
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Quote:
Originally Posted by cmac2012
Cheater.
Howdy cmac,
I was hoping for a 60's flashback :-) But I ended up with the same results.
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  #13  
Old 10-28-2005, 10:07 AM
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Why is green the negative of pink? Do all colors have opposites in our eyes or just some?
As far as I can tell, my neck is normal for my age. MRI six weeks after surgery showed my spinal cord to be completely free of impingement. I wouldn't mind getting another MRI now and seeing what it looks like. The long term consequences of the procedure are unstudied.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #14  
Old 10-29-2005, 02:32 AM
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Quote:
Originally Posted by bobbyv
If you stare at a sharp black-and-white pattern for an extended picture of time, then stare at a blank wall, you will see the "negative" of the pattern you were originally staring at.

Green seems to be the "negative" of pink. When you stare at the center of the circle for a while, then look at another part of the screen, you will see a circle of green dots - this is the negative image of the pink dots.

When a pink dot turns off, you will see its negative image (green) shortly afterwards. As the pink dots sequentially turn off and on around the circle, you therefore see a green dot circulating.

I have no explanation for the pink dots disappearing ... maybe it is Visine ...
This is a good explanation, as is the one following yours by Matt L. You know how they say the olfactory sense fatigues quickly and that's why people who stink or use too much perfume don't know it? I was thinking that maybe, well almost certainly, the optic nerves and muscles fatigue as well. So when you're looking at only pink, the not-pink receptor part is realtively fresh and in the absense of new stimulii might come to the fore briefly.

Could be that's why the pink disappear. The pink receptor synapses take a nap.
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  #15  
Old 10-29-2005, 02:53 AM
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Quote:
Originally Posted by MedMech
Whoa, tha's some cool stuff, but I can only take a few at a time -- getting seasick. My nephews'll dig that one.
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