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The article offers information on 3-D works and how human eyes are able to interpret 3-D displays. It states that in 1960s two scientists were able to show that eighty percent of the cells in primary visual cortex were binocularly responsive and cells in the cortex responded to different levels of crossed and uncrossed disparity. It mentions that use of polarisation to present stereoimages became a feasible technique to be used in entertainment with development of digital technologies.

In this article, the author explains how three-dimensional displays work and how visual system of human being is able to interpret them. The author tells that one of the finest discriminations that the human visual system can make is stereoscopic depth perception. He further tells that stereoscopic displays use flat patterns that creates stereoscopic image in the visual cortex.