Nocturnally roving weird, purple jellydots

[Gokul43201]

1. Look at the whole picture from a distance,
2. Follow the green spot closely and see what happens to it,
3. Now focus hard, on the cross in the center ...

http://www.i-am-bored.com/bored_link.cfm?link_id=11084

[zoobyshoe]

Whoaaa! Duuuuude! Ya shoulda, like warned people who are on acid not to go there, man.

[matthyaouw]

Ok thats pretty crazy... Can anyone explain to me what in the hell is going on?

[honestrosewater]

Ok thats pretty crazy... Can anyone explain to me what in the hell is going on?I think it's because you aren't moving your eyes. Your eyes usually move around slightly so some nerves can rest and/or your brain can construct the image. But I could be wrong. I'll ask my magic 8 ball.

It's called the Troxler effect or Troxler fading or Selective Peripheral Fading.
http://cognet.mit.edu/posters/TUCSON3/Lou.html
http://www.troxlerforum.ch/
I couldn't find much on it quickly.

[JamesU]

what does that have to do with purple roving nocturnal jelly--- oh, jellydots! gotcha :wink:

[BicycleTree]

Actually, there is no green spot, just blank gray.

[Gokul43201]

That is true.

Also, try hyperphysics for "rods and cones".

[Ivan Seeking]

Hey, I've never seen that one before! Very cool.

[Evo]

If you move your eyes in a circle following the dots, you cannot see the "green" dot, they all remain "pink" (they look closer to pink than purple)