(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)