# circle of confusion

> blurry region in optics

**Wikidata**: [Q196727](https://www.wikidata.org/wiki/Q196727)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Circle_of_confusion)  
**Source**: https://4ort.xyz/entity/circle-of-confusion


## References

1. Freebase Data Dumps. 2013
2. Quora