1. A 3-dimensional display system comprising: headwear having means mounted thereon to project individual images of a 3-dimensional object into respective eyes of a person wearing said headwear, means for monitoring variations of spatial coordinates relating to said wearer, means for monitoring variations of an orientation of said wearer's head, means for monitoring a line of sight of each said eye of said wearer and for monitoring variations of an angle of convergence of said lines of sight, computer means for generating two images of the three-dimensional object having spatial coordinates, and means for modifying said images in response to variations of a relationship between said spatial coordinates, said orientation and said angle of convergence, such that the image presented to each said eye is of said 3-dimensional object as seen by said eye at a distance from said wearer determined by said angle of convergence whereby said wearer perceives said object stereoscopically.