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Comments to #6
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mali22 11 year s ago
I don't get #13. I googled it and found that the eyes are supposed to switch from left to right but I just don't see it :/
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AMemoriam 11 year s ago
I think the shadow is supposed to make you think that her eyes are on her left, but it doesn't work.
Now. Consider that the horizontal lines in this picture are perfectly straight.
This illusion was discovered by Dr Richard Geoaring as he stared at the tiles in his local cafe in Bristol, possibly while hung over.