circle of confusion

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circle of confusion

noun circles of confusion

An optical spot caused by a cone of light rays from a lens not coming to a perfect focus when imaging a point source.
Similar: blur circle, blur spot, circle of indistinctness, disc of confusion, disk of confusion

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MLA

"circle of confusion." Wiktionary, via Micwyn, micwyn.com/word/circle%20of%20confusion. Accessed 6 Nov. 2026.

APA

circle of confusion. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/circle%20of%20confusion

Chicago

"circle of confusion." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/circle%20of%20confusion.

BibTeX

@misc{circle_of_confusion_2026,
  title = {circle of confusion},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/circle%20of%20confusion},
  urldate = {2026-11-06}
}