# bifocal lens

> eyeglass lens with two distinct optical powers

**Wikidata**: [Q858340](https://www.wikidata.org/wiki/Q858340)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Bifocals)  
**Source**: https://4ort.xyz/entity/bifocal-lens


## References

1. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
2. Freebase Data Dumps. 2013
3. National Library of Israel Names and Subjects Authority File
4. KBpedia
5. GF WordNet