I am bringing to NANOS a couple of copies of Dr. Hoyt's stereo atlas The Ocular Fundus in Neurologic Disease. It has multiple viewmaster reels illustrating amongst other things papilledema, pseudo-papilledema, optic atrophy and congenital problems. The reels can be viewed in a simple viewer obtained from a toy store or from amazon for about 5 dollars. This enables you to see the Kodachrome slides in stereo.
You can also project rhe reels with a Viewmaster 500 stereo projector on a silver screen to an audience of about a hundred with the audience wearing polarizing glasses. This works great for teaching resudents in Neurology, Ophthalmology and Neurosurgery. I have also used for teaching medical students. Several students have told me it is what got them interested in Ophthalmology. The projectors and screen and glasses can be obtained on ebay for a total cost of about 500 to 600 dollars. You can also view them with a Model D self illuminated viewmaster viewer in high magnification obtained in ebay for about 125 dollars.
I bought these in late 1970s and 80s from rare book dealers and they are in great condition. H. Stanley Thompson told me they were the most frequently stolen books from Eye department libraries.
In the early 90s I worked with Dr. Hoyt to update these but the publisher pulled out after finding the reels were to expensive to reproduce.
Jeffrey Odel