(SIRDS, originally "autostereogram") A stereogram composed of (coloured) dots which when viewed correctly appears three-dimensional. SIRDs were invented by Dr. Christoper Tyler, Associate Director of the Smith-Kettlewell Eye Research Institute in San Francisco (1999). FAQ . {Nice pictures (http://www.eleves.ens.fr:8080/home/massimin/index.ang.html)}. picture Gallery . Vern Hart' s SIRDS Gallery . {SGI Gallery (http://www.sgi.com/free/gallery.html)}. (1996-11-06)