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For questions relating to optical illusions, how our perceptual and cognitive mechanisms give rise to them, the neurological basis of perceiving optical illusions and general queries relating to optical illusion research.

4 votes
1 answer
268 views

Why can I see the number only when I don't look directly at it?

I've recently found the following image: I can easily see the "17" in the image if I'm scrolling and (much less easy) when I move my eyes and don't look directly on it. Why is that the case? In ca …
Martin Thoma's user avatar