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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.

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How much our visual limitations are instrument(eye)-based, and how much are they brain-based?

My understanding is that the eyes are actually quite poor in terms of providing the brain with a clean image. Perhaps the only areas where eyes are better than cameras are with simultaneously viewing …
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