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The above list shows replies to the following message: |
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Msg. 19130 of 21975
(This msg. is a reply to 19128 by lkorrow) |
Close one eye and hold something round out in front of the image until it matches the size of one of the shapes and you'll see that they are indeed quite circular.
This is called a phase-shift or Popple illusion.
If you want a real explanation, it'll cost ya... http://www.sciencedirect.com/science/article/pii/S0042698904003694 The eye is easily fooled. The rings below are concentric.
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