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:iconform-constant: #Form-Constant

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March 30, 2009
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:iconmarkdow:
Can you find a light gray spot centered on an intersection of black lines? Most people percieve illusory peripheral light spots while visually scanning the image. It works better at full view.

This grid illusion was first reported by Ludimar Hermann in 1870. There is no current consensus of the neural mechanism causing the illusion. See Michael's examples and discussion.

This variation, with many line widths, works well at different viewing distances and with reversed contrast.


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There are no restrictions on use of this image. Claiming to be the originator or owner, explicitly or implicitly, is bad karma. A link (if appropriate), a note to dow@uoregon.edu, and credit are appreciated but not required.
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:iconaspartam:
~Aspartam Jun 29, 2010
It works !
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:iconparrotdolphin:
*parrotdolphin Mar 30, 2009  Professional Digital Artist
I see them when I don't look right at them. When I look right at them, then they go away, but not instantly, I can see them fade away.
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:iconlillyanna:
Mood: Joy ~Lillyanna Mar 30, 2009
I lovvvvvvvvvvvvvvvvvvvvvvvvvvvvvvve it :)

Keep a smile on :)

Lillyanna
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