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used to search for magnified examination of the anterior segment of the eye (uniocular or binocular) Jackson's cross cylinder: used to check the power and axis of a cylindrical lens: Maddox rod: used to test for latent squint and retinal function Refraction box: has lenses of different powers for refraction testing: Slit lamp bio microscope
The business boomed through the 1950s and early 1960s. At the end of the war the market was flooded with high quality ex-military optical and photographic equipment. Charles Frank Ltd took advantage of this ready supply by buying these goods at public auctions held when no longer needed by the military and reselling them to the public.
Research Enterprises Limited (REL for short) was a short-lived Toronto-based Crown Corporation that built electronics and optical instruments during World War II. They existed only six years from late 1940 until 1946, and were active only from late 1941, but during that period they became Leaside 's largest employer, producing C$ 220 million ...
An optical device is a device that creates, manipulates, or measures electromagnetic radiation ... Photography equipment (15 C, 135 P) Photomultipliers (3 P)
Pages in category "Ophthalmic equipment" The following 34 pages are in this category, out of 34 total. This list may not reflect recent changes. ...
General Optical sold out to Shuron Optical of Geneva, New York, in 1927, which sold the refractor until the late 1930s. [2] A refined and improved version of the Genothalmic Refractor was manufactured in London starting around 1932, and sold in the UK by S. R. Stearman, S. Pulzer & Son Ltd., and others, as the British Refracting Unit (B.R.U.).