# Orthoscopy

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Orthoscopy
> Markdown URL: https://mediated.wiki/source/Orthoscopy.md
> Source: https://en.wikipedia.org/wiki/Orthoscopy
> Source revision: 1295565382
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

**Orthoscopy** used in optics and vision for the condition of normal, distortion-free view, from *"ortho",* straight, right, correct, and *"scope"*, seeing.

[Abbe](/source/Ernst_Abbe) in 1880[1] designed an *orthoscopic* [eyepiece](/source/Eyepiece) for stereoscopic microscopes which minimized distortion. The term was also used in [stereoscopy](/source/Stereoscopy) by Heine [2][3] for the condition when the perceived depth in a [stereogram](/source/Stereoscopy) is the same as that in the actual view of the scene. Such a perceptual report by an observer must be distinguished from what [Moritz von Rohr](/source/Moritz_von_Rohr) called *homeomorphic view,* in which the depth in a stereoscopic 3D reconstruction is merely geometrically true, see [Stereoscopic Depth Rendition](/source/Stereoscopic_Depth_Rendition). The difference between *homeomorphic* and *orthoscopic* is typical of the divide in [psychophysics](/source/Psychophysics) between the world of physical stimuli and the world of subjects' percepts, see [Gustav Fechner](/source/Gustav_Fechner).

## References

1. See Czapski S, Eppenstein O. (eds.) 1924 *Grundzüge der Theorie der Optischen Instrumente nach Abbe* J. Barth, Leipzig p. 658

1. Heine, L. (1900). ["Ueber "Orthoskopie" oder Ueber die Abhängigkeit relativer Entfernungsschätzungen von der Vorstellung absoluter Entfernung"](https://link.springer.com/10.1007/BF01938814) (in German). *Albrecht von Graefes Archiv für Ophthalmologie*. **51** (3): 563–572. [doi:10.1007/BF01938814](https://doi.org/10.1007/BF01938814). [ISSN 0721-832X](https://www.worldcat.org/issn/0721-832X). [S2CID 37423093](https://api.semanticscholar.org/CorpusID:37423093)

1. Heine, L. (1901). ["Ueber Orthostereoskopie"](https://link.springer.com/10.1007/BF01947986) (in German). *Albrecht von Graefes Archiv für Ophthalmologie*. **53** (2): 306–315. [doi:10.1007/BF01947986](https://doi.org/10.1007/BF01947986). [ISSN 0721-832X](https://www.worldcat.org/issn/0721-832X). [S2CID 27706321](https://api.semanticscholar.org/CorpusID:27706321)

---
Adapted from the Wikipedia article [Orthoscopy](https://en.wikipedia.org/wiki/Orthoscopy) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Orthoscopy?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.