Lines of illusion

I almost feel it's lazy to introduce an another illusion as my Interesting Thing for today. The problem is I find all illusions interesting, and it would be far too easy to fill this blog with them.

But I couldn't resist this one. The question is, are these two pictures the same?


The answer of course, whatever your eyes may be telling you, is that they are identical. The photographic version of this illusion shows the effect more clearly.

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