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stereoscopy |
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stereoscopy [‚ster·ē′äs·kə·pē] (physiology) The phenomenon of simultaneous vision with two eyes in which there is a vivid perception of the distances of objects from the viewer; it is present because the two eyes view objects in space from two points, so that the retinal image patterns of the same object are slightly different in the two eyes. Also known as stereopsis; stereoscopic vision. Stereoscopy The phenomenon of simultaneous vision with two eyes, producing a visual experience of the third dimension, that is, a vivid perception of the relative distances of objects in space. In this experience the observer seems to see the space between the objects located at different distances from the eyes. Stereopsis, or stereoscopic vision, is believed to have an innate origin in the anatomic and physiologic structures of the retinas of the eyes and the visual cortex. It is present in normal binocular vision because the two eyes view objects in space from two points, so that the retinal image patterns of the same object points in space are slightly different in the two eyes. The stereoscope, with which different pictures can be presented to each eye, demonstrates the fundamental difference between stereoscopic perception of depth and the conception of depth and distance from the monocular view. See Vision How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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For example, I put a stereoscopic view looking out a window into the garden next to the photographed window. This approach provides a simple means of photographing translucent specimens to obtain stereoscopic views from which [three-dimensional] aspects of internal structure can be appreciated," says Alan Boyde of University College in London, England. Two of the video cameras capture a stereoscopic view of the surgical site; the third camera is used for viewpoint tracking, in combination with optical markers framing the surgical site. |
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