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Re: Illusions...

By: lkorrow in CONSTITUTION | Recommend this post (0)
Sun, 05 Aug 12 8:33 AM | 49 view(s)
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Msg. 19134 of 21975
(This msg. is a reply to 19130 by DueDillinger)

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Actually, I found I could see the circle when focusing on tracing the innter edge of the circle. I can do it on the inner circle of this one, but not the outer. Fascinating...




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Re: Illusions...
By: DueDillinger
in CONSTITUTION
Sun, 05 Aug 12 6:46 AM
Msg. 19130 of 21975

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.
Here's a variation:

Uploaded Image

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.

Uploaded Image

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