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bifocal lens

eyeglass lens with two distinct optical powers
Thing general Q858340
bifocal lens
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bifocal lens

Summary

bifocal lens ranks in the top 2% of general entities by monthly Wikipedia readership (1,198 views/month).[1]

Key Facts

  • bifocal lens is credited with the discovery of Benjamin Franklin[2].
  • bifocal lens is a type of lens[3].
  • bifocal lens's Commons category is recorded as Bifocals[4].

Body

Definition and Type

bifocal lens is a type of lens[3].

Why It Matters

bifocal lens ranks in the top 2% of general entities by monthly Wikipedia readership (1,198 views/month).[1] It has Wikipedia articles in 17 language editions, a strong signal of global cultural recognition.[5] It is known by 17 alternative names across languages and contexts.[6]

Related Entities

Benjamin Franklin

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.

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [5] ↑ . Wikidata sitelinks. wikidata.org.
  3. [6] ↑ . 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). bifocal lens. Retrieved April 10, 2026, from https://4ort.xyz/entity/bifocal-lens
MLA “bifocal lens.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/bifocal-lens.
BibTeX @misc{4ortxyz_bifocal-lens_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{bifocal lens}}, year = {2026}, url = {https://4ort.xyz/entity/bifocal-lens}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): bifocal lens — https://4ort.xyz/entity/bifocal-lens (retrieved 2026-04-10)

Canonical URL: https://4ort.xyz/entity/bifocal-lens · 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. 5d ago · Twofivesixbot bot · 2026-05-26 view diff on Wikidata ↗
    Discoverer or inventor → Benjamin Franklin
    Subclass of → —
    Aliases → —
    Subclass of → lens
    "/* wbsetclaim-update-qualifiers:1||1|3 */ [[Property:P8189]]: 987007541794505171, mv to monolingual text names on J9U statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.