A new stereoscopic projection system has been developed for simultaneo
us viewing of microsurgical procedures by hundreds of participants at
neurosurgical meetings. The video images recorded from each eyepiece o
f an operating microscope were projected onto two wide screens, which
were viewed by two converging eyes or by cross-sight. The system was s
imple and proved to be of great practical use although it yielded mino
r eyestrain and required some practice.