Snellen chart

eye chart used to measure visual acuity
Thing eye_chart Q556012
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Snellen chart

Summary

Snellen chart is an eye chart[1]. It draws 1,390 Wikipedia views per month (eye_chart category, ranking #1 of 9).[2]

Key Facts

  • Snellen chart is credited with the discovery of Hermann Snellen[3].
  • Snellen chart's image is recorded as Snellen chart.svg[4].
  • Snellen chart's image is recorded as Snellen chart in ISO standard.svg[5].
  • Snellen chart's image is recorded as Snellen chart in North American standard.svg[6].
  • Snellen chart's instance of is recorded as eye chart[7].
  • Hermann Snellen is named after Snellen chart[8].
  • Snellen chart's subclass of is recorded as measurement tool[9].
  • Snellen chart's subclass of is recorded as visual acuity[10].
  • Snellen chart's Commons category is recorded as Snellen charts[11].
  • Snellen chart's time of discovery or invention is recorded as +1862-00-00T00:00:00Z[12].
  • Snellen chart's Freebase ID is recorded as /m/037yzs[13].
  • Snellen chart's Encyclopædia Britannica Online ID is recorded as technology/Snellen-chart[14].
  • Snellen chart's WordLift URL is recorded as http://data.medicalrecords.com/medicalrecords/healthwise/snellen_chart[15].
  • Snellen chart's Microsoft Academic ID is recorded as 2776599710[16].
  • Snellen chart's WordNet 3.1 Synset ID is recorded as 05663412-n[17].
  • Snellen chart's OpenAlex ID is recorded as C2776599710[18].

Body

Works and Contributions

Snellen chart is credited with the discovery of Hermann Snellen[3].

Why It Matters

Snellen chart draws 1,390 Wikipedia views per month (eye_chart category, ranking #1 of 9).[2] It has Wikipedia articles in 17 language editions, a strong signal of global cultural recognition.[19] It is known by 22 alternative names across languages and contexts.[20]

References

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

Direct Wikidata claims

  1. [4] . wikidata.org.
  2. [5] . wikidata.org.
  3. [6] . wikidata.org.
  4. [7] . wikidata.org.
  5. [3] . wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . Freebase Data Dumps. wikidata.org.
  12. [14] . wikidata.org.
  13. [15] . medicalrecords.com. medicalrecords.com. Provenance: wikidata.org.
  14. [16] . wikidata.org.
  15. [17] . GF WordNet. wikidata.org.
  16. [18] . OpenAlex. Retrieved . docs.openalex.org. Provenance: wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [19] . Wikidata sitelinks. wikidata.org.
  3. [20] . 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). Snellen chart. Retrieved May 3, 2026, from https://4ort.xyz/entity/snellen-chart
MLA “Snellen chart.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/snellen-chart.
BibTeX @misc{4ortxyz_snellen-chart_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Snellen chart}}, year = {2026}, url = {https://4ort.xyz/entity/snellen-chart}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Snellen chart — https://4ort.xyz/entity/snellen-chart (retrieved 2026-05-03)

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