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 by Heine for the condition when the perceived depth in ...
(or-thos´kә-pe) examination by means of an orthoscope.
orthoscopy Examination of the eyes for visual distortions.