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arXiv:2509.11582physics.optics

When Purple Perceived Only at Fixation: A Fixation and Distance-Dependent Color Illusion

Hinnerk Schulz-Hildebrandt

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Abstract

In this paper a novel optical illusion is described in which purple structures are perceived as purple at the point of fixation, while the surrounding structures of the same purple color are perceived toward a blue hue. As the viewing distance increases, a greater number of purple structures revert to a purple appearance.

arXiv comments
4 pages, 4 figures
Journal reference
DOI
Subjects
physics.opticsOptics q-bio.NCNeurons and Cognition

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Linked by 1 identifiable commenter in 1 comment across 1 thread, from Jun 2026 to Jun 2026. Found in 2 HN submissions from Mar 2026 to Jun 2026. Open submission discussions.

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Discussed in comments1 thread

  1. Whichever of the purple dots you look at turns more purple 1 comment

    • When Purple Perceived Only at Fixation: A Fixation and Distance-Dependent Color Illusion https://arxiv.org/abs/2509.11582

      doenerView on HNParent context

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