  This paper is concerned with the use of the stereographic projection to map
the points of a design on the sphere in three dimensions onto a two-dimensional
stereogram. Details of the projection and its attendant stereogram are given
and the application of the constructs to designs on the sphere is highlighted.
Spherical $t$-designs are then introduced and stereograms of selected examples
are presented. In addition, examples of regression models with design space the
unit ball are considered, stereograms which represent the spherical component
of such designs are given and an example in which stereograms are used to
elucidate the geometric isomorphism of a suite of designs generated by an
exchange algorithm is presented. Emphasis throughout the text is placed on the
use of the stereographic projection in teaching and research within the
framework of statistics.
