Hermann Grid: Dark Spots at the Crossings

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Curated archive entry based on published research. A grid of pale lines on a dark background can produce illusory gray smudges at peripheral intersections; the spots fade when directly fixated. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.

SOURCE: https://pmc.ncbi.nlm.nih.gov/articles/PMC1800350/

TAGS: #curated #publishedresearch #perception

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