The viewing distance is an important factor for stereoscopic and
autostereoscopic displays, and affects not only the depth perception
but also the comfortfor eyes perception. Although a viewer can
have strong perception ofthe depth perception when watching at a
close distance, certain eye pressure may be imposed on the viewer.
It is suggested that the viewing distance should be at least three
times the height of the display screen [22]. The viewer can adjust
the viewing distance appropriately according to the properties of
display and location.