(Instructions for) the polarized Giantscope (ophthalmoscope)
 Catalogue Number: 2019 (Instructions for) the polarized Giantscope (ophthalmoscope) Category: Papers Sub-Category: Ophthalmic product manual/instructions Corporation: American Optical Company Year Of Publication/Manufacture: 1957 Time Period: 1940 to 1999 Place Of Publication/Manufacture: New York Publisher/Manufacturer: American Optical Company Description Of Item: Paper wrappers printed in two colours, 8 pages, one black and white photographic illustration and 2 line drawing figures. Historical Significance: The Giantscope was first introduced in 1926. It was one of the first ophthalmoscopes to use a polarizing filter to lessen corneal reflections. The first three patents were granted in 1933 & 1934. The fourth was not granted until April 27, 1937. All were for Edwin H Land's inventions for polarizing filters. The museum holds an example of this instrument dated c1936 (Cat No 2011) How Acquired: Purchased by Kett Museum Date Acquired: April 2012 Condition: Clean but has been folded Location: Archive office. Pamphlet and ephemera filing cabinet. Drawer 5 |