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optical illusion

visual perception that differs from objective reality
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Summary

optical illusion ranks in the top 2% of general entities by monthly Wikipedia readership (4,427 views/month).[1]

Key Facts

  • Subclass of: illusion[2], image[3]
  • Commons category: Optical illusions[4]
  • Topic's main category: Category:Optical illusions[5]
  • Commons gallery: Optical illusion[6]
  • Described by source: Armenian Soviet Encyclopedia, vol. 12[7], Brockhaus and Efron Encyclopedic Dictionary[8], Small Brockhaus and Efron Encyclopedic Dictionary[9], Meyers Konversations-Lexikon, 4th edition (1885–1890)[10]
  • Different from: optical illusion image[11]
  • On focus list of Wikimedia project: Wikipedia:Vital articles/Level/4[12]
  • Maintained by WikiProject: WikiProject Mathematics[13]
  • P14541: F9wwi[14]

Why It Matters

optical illusion has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[15] It is known by 106 alternative names across languages and contexts.[16]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . wikidata.org.
  9. [10] ↑ . wikidata.org.
  10. [11] ↑ . wikidata.org.
  11. [12] ↑ . wikidata.org.
  12. [13] ↑ . wikidata.org.
  13. [14] ↑ . wikidata.org.

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [15] ↑ . Wikidata sitelinks. wikidata.org.
  3. [16] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). optical illusion. Retrieved October 13, 2026, from https://4ort.xyz/entity/optical-illusion
MLA “optical illusion.” 4ort.xyz Knowledge Graph, 4ort.xyz, 13 Oct. 2026, https://4ort.xyz/entity/optical-illusion.
BibTeX @misc{4ortxyz_optical-illusion_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{optical illusion}}, year = {2026}, url = {https://4ort.xyz/entity/optical-illusion}, note = {Accessed: 2026-10-13}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): optical illusion — https://4ort.xyz/entity/optical-illusion (retrieved 2026-10-13)

Canonical URL: https://4ort.xyz/entity/optical-illusion · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 11d ago · Kareyac · 2026-10-03 view diff on Wikidata ↗
    Described by source → Armenian Soviet Encyclopedia, vol. 12, Brockhaus and Efron Encyclopedic Dictionary, Small Brockhaus and Efron Encyclopedic Dictionary +1
    Harper's tag → optical-illusions
    Wikipedia languages → ['ar', 'ast', 'bg', 'bn', 'ca', 'commons', 'cs', 'da', 'de', 'en', 'eo', 'es', '
    Claims rich → —
    "/* wbsetclaim-update:2||1 */ Described by source: Armenian Soviet Encyclopedia, vol. 12"
  2. 13w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → F9wwi
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  3. 17w ago · Jindřich Rubeš · 2026-06-12 view diff on Wikidata ↗
    Svkkl authority id → 0204209-zrakove-klamy
    "/* wbcreateclaim-create:1| */ Svkkl authority id: 0204209-zrakove-klamy, [[:toollabs:quickstatements/#/batch/259493|batch #259493]]"
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