ABSTRACT
Angular magnification does not cause a problem when viewing with only one eye, because objects simply look nearer. However, when both eyes are involved angular magnifications can lead to apparent distortions of objects. It was Wheatstone (1838) who first appreciated that the separation of the eyes results in each eye forming a slightly different image of the scene, and investigated the role of these slight differences by presenting planar projections of objects to each eye, rather than the objects themselves. In the Wheatstone stereoscope when separate pictures of a scene, which differ only in vantage point, are delivered to each eye then the scene appears three - dimensional. The distortions in stereovision which are caused by angular magnification of the image in one eye are analysed in this chapter.
