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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 has Wikipedia articles in 17 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • Snellen chart is credited with the discovery of Hermann Snellen[3].
  • Snellen chart's instance of is recorded as eye chart[4].
  • Hermann Snellen is named after Snellen chart[5].
  • Snellen chart is a type of measurement tool[6].
  • Snellen chart is a type of visual acuity[7].
  • Snellen chart's Commons category is recorded as Snellen charts[8].
  • Snellen chart's time of discovery or invention is recorded as 1862[9].
  • Snellen chart's WordLift URL is recorded as http://data.medicalrecords.com/medicalrecords/healthwise/snellen_chart[10].

Body

Definition and Type

Snellen chart's instance of is recorded as eye chart[4]. Recorded subclass of include measurement tool[6] and visual acuity[7].

Origins

Hermann Snellen is named after Snellen chart[5].

Why It Matters

Snellen chart has Wikipedia articles in 17 language editions, a strong signal of global cultural recognition.[2] It is known by 22 alternative names across languages and contexts.[11]

References

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

Direct Wikidata claims

  1. [4] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . medicalrecords.com. medicalrecords.com. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikidata sitelinks. wikidata.org.
  2. [11] ↑ . 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)

Canonical URL: https://4ort.xyz/entity/snellen-chart · 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. 18d ago · JhealdBatch bot · 2026-06-16 view diff on Wikidata ↗
    Subclass of → —
    On focus list of wikimedia project → Q140249898
    Named after → Hermann Snellen
    Subclass of → measurement tool, visual acuity
    + 5 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/36807|batch #36807]]: tag for concrete/abstract disjunction anomaly"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.