use of parallax vision in virtual reality systems

Stereoscopic vision is the result of work on the fact that human eyes see actual things from two intersecting angles. Eye muscles and neural analysis of one's brain work together to combine these two alternate images into perception a single image with three dimensions. Muscles in each eye change the shape of each the lens to focus at the distance of the object viewed. Other muscles change the orientations of the eyes so that the angles of perception from both eyes cross at that same distance. In real world vision, these two muscle functions work together. In Virtual Reality, they may conflict. When images are shown at great distances, then the size of the screen required for immersion is overly large in size and it is challenging to present alternate images to the eyes. When pictures are displayed near to one's eyes extremely high picture resolution is needed and the two muscle functions of the eyes tend to conflict. Further, Journal of Virtual Reality and Broadcasting includes coverage of this VR material.

The edges of an object separate it from the setting. The outline of its shape also provides visual signals about its three-dimensionality. The outer edges of an object create its outline and are the link between interaction among objects (including overlap, scale, and parallax as discussed) and the internal configuration of the object. An object's inner edges bridge the outer boundaries of the object and its inner surfaces and textures. Together, the outer and inner edges of an object provide strong cues about its three-dimensional size, location, angle, and motion. Also, Virtual Tours Grand Rapids, Michigan deals with this material.

See also: Virtual Reality TVs discusses different developments.