Orthoscopy used in optics and vision for the condition of normal, distortion-free view, from ''"ortho",'' straight, right, correct, and ''"scope"'', seeing.
Abbe in 1880 designed an ''orthoscopic''
eyepiece for stereoscopic microscopes which minimized distortion. The term was also used in
stereoscopy
Stereoscopy (also called stereoscopics, or stereo imaging) is a technique for creating or enhancing the illusion of depth in an image by means of stereopsis for binocular vision. The word ''stereoscopy'' derives . Any stereoscopic image is ...
by Heine
for the condition when the perceived depth in a
stereogram 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 called ''homeomorphic view,'' in which the depth in a stereoscopic 3D reconstruction is merely geometrically true, see
Stereoscopic Depth Rendition Stereoscopic depth rendition specifies how the depth of a three-dimensional object is encoded in a stereoscopic reconstruction. It needs attention to ensure a realistic depiction of the three-dimensionality of viewed scenes and is a specific instan ...
. The difference between '' homeomorphic'' and ''orthoscopic'' is typical of the divide in
psychophysics
Psychophysics quantitatively investigates the relationship between physical stimuli and the sensations and perceptions they produce. Psychophysics has been described as "the scientific study of the relation between stimulus and sensation" or, m ...
between the world of physical stimuli and the world of subjects' percepts, see
Gustav Fechner
Gustav Theodor Fechner (; ; 19 April 1801 – 18 November 1887) was a German physicist, philosopher, and experimental psychologist. A pioneer in experimental psychology and founder of psychophysics (techniques for measuring the mind), he inspired ...
.
References
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Stereoscopy