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HandWiki. Entoptic Phenomenon. Encyclopedia. Available online: https://encyclopedia.pub/entry/32493 (accessed on 15 September 2026).
HandWiki. Entoptic Phenomenon. Encyclopedia. Available at: https://encyclopedia.pub/entry/32493. Accessed September 15, 2026.
HandWiki. "Entoptic Phenomenon" Encyclopedia, https://encyclopedia.pub/entry/32493 (accessed September 15, 2026).
HandWiki. (2022, November 02). Entoptic Phenomenon. In Encyclopedia. https://encyclopedia.pub/entry/32493
HandWiki. "Entoptic Phenomenon." Encyclopedia. Web. 02 November, 2022.
Entoptic Phenomenon
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The content is sourced from: https://handwiki.org/wiki/Physics:Entoptic_phenomenon

Entoptic phenomena (from grc ἐντός (entós) 'within', and ὀπτικός (optikós) 'visual') are visual effects whose source is within the human eye itself. (Occasionally, these are called entopic phenomena, which is probably a typographical mistake.) In Helmholtz's words: "Under suitable conditions light falling on the eye may render visible certain objects within the eye itself. These perceptions are called entoptical."

visual effects 'visual' ὀπτικός

References

  1. Minnaert, M. G. J. (1940). Light and colour in the open air (H. M. Kremer-Priest, Trans.). London: G. Bell and Sons.
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