Welch Allyn Ophthalmoscope Model 11600
 Catalogue Number: 2833 Welch Allyn Ophthalmoscope Model 11600 Category: Equipment Sub-Category: Ophthalmoscope Year Of Publication/Manufacture: c1977 Time Period: 1940 to 1999 Place Of Publication/Manufacture: New York State, USA Publisher/Manufacturer: Welch Allyn Description Of Item: Welch Allyn direct ophthalmoscope Model No 11600. Single disc of lenses: 0 to +10 DS (1), +12, +15, +20, +40, -25, -20, -15, -10, -8, -6 to -1 DS (1). Black and white plastic, glass, chromed metal. Features halogen globe and rechargeable battery handle. Battery removed. Battery housing labelled 'WELCH ALLYN/ 71052/ 200-250 V/ 50-60HZ/ 6 MA/ SKAN. FALLS, N.Y., U.S.A.' L 220mm x W 42mm x D 33mm. Historical Significance: The first hand-held direct illuminating ophthalmoscope was developed by Dr Francis Welch and William Noah Allyn in 1915. In 1959 Welch Allyn were the first company to use rechargeable batteries within diagnostic instruments. In 1973 the company became the first company to develop and use subminiature halogen lamps for medical diagnostic equipment. Halogen improved the intensity of the light and gave a better colour temperature for diagnosis. How Acquired: Donated by David Cockburn, honoray life member of the College Date Acquired: July 2008 Condition: Good Location: Archive Office. Cabinet One Drawer 9 |