Wow, another cool optical illusion.

Taken (wholesale!) from Random Knowledge

Concentrate on the four small dots in the middle of the picture for 30 – 40 secs. Then look at any smooth single coloured surface near you (wall, paper,…). You will see a circle of light developing. Now blink your eyes a couple of times and you will see an image emerging. Do you recognize the image?
Click through to the original site if you want some spare white-space on your screen (and also to give the guy hits).
Can anyone explain to me how it works?

About rpg

Scientist, poet, gadfly
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15 Responses to Wow, another cool optical illusion.

  1. Craig Rowell says:

    holy crap wow that is cool

  2. Roberto Keller says:

    OMG this rocks, its freaking Dave Grohl!

  3. Graham Steel says:

    @Bob – Jesus, that’s soooo like 5 years ago :(
    @Roberto – here’s “What If I do (live)” Foo Fighters, was going to send a link, but what the hell:-

  4. Bob O'Hara says:

    Jesus? He’s slightly more than 5 years ago.

  5. Graham Steel says:

    Quite, I’m expecting a Jehovah any minute now but not in The Bibical sense, obviously (off too cook muchos portions of fried rice).
    (But before I do and whilst remaining completely off topic, having just recently uploaded many pics onto my new porto. gizmo what the HELL was I thinking when I CREATED this shot of BEAST???)

    I remember now.

  6. Richard Wintle says:

    You know, I think I saw that guy on my breakfast toast this morning.

  7. Cath Ennis says:

    I still think it’s George Harrison

    RIP
    I don’t know exactly how it works, but I think it’s something to do with the image “burning” itself onto your retina, which retains an inverted “negative” version of the image for a few seconds after you finally look away from it. I think if the original image is in colour, the negative image is in the “opposite” colour.

  8. Richard P. Grant says:

    Wow. All I got was a five-pointed star.

  9. Kristi Vogel says:

    @ Richard W. – Ha ha, I was just going to say that I saw the image in a tortilla this morning.
    Or was it a grilled cheese sandwich?
    I live in the Land of Pareidolia. Yes, I know.

  10. Alejandro Correa says:

    I saw him now in my e-mail. ac@alejandrocorrea.cl

  11. Sabbi Lall says:

    @ Kristi Wasn’t there a bagel too?

  12. Cath Ennis says:

    I did just get an email through Nature Network saying “Greetings in Jesus name” and stating an intent to “donate the sum of(Euros4.500 000) Four million Five hundred thousand Euros, to your church”.
    Targeted marketing FAIL! I don’t think I’ll be contacting that attorney in Côte d’Ivoire, as requested.

  13. Alejandro Correa says:

    Uf!!, I believe that we are two.

  14. Richard P. Grant says:

    Got that one too. Couldn’t even be arsed reporting it as spam.

  15. Alejandro Correa says:

    Yes. Strange message and was thinking of buying a great house in London.