Lederer Lens Trial Set

Catalogue Number: 2403
Lederer Lens Trial Set
Category: Spectacles and lenses
Sub-Category: Low vision aid
Designer/inventor: Josef Lederer
Year Of Publication/Manufacture: c 1955
Time Period: 1940 to 1999
Place Of Publication/Manufacture: Australia
Description Of Item: Three trial lenses each in own cloth bag marked L, M, and H respectively. Lens powers +11.50 (L), +17.75 (M), +29.50 (H). Lenses in conventional 38 mm trial case rims, powers unmarked. Contained in blue-grey jewel box, not originally supplied with the lenses with metal catch. Lederer Lenses hand written on top. Box also contains three 38 mm diameter black discs with trial lens type lugs with 1/2 mm, 1 mm and 2 mm pinholes. Box dimensions 71 x 56 x 58 mm. For other examples see Cat nos. 1303, 2105.
Historical Significance: Professor Lederer (1921-2007) was professor of optometry at the University of NSW. He was the first professor of optometry in Australia. He advocated better optometric care for patients with low vision and designed this set of lenses to provide high plus correction for low vision. The design was published in Nature and Aust J Optom. [Lederer J. A new development in aids for sub-normal vision. Nature 1954; 4438: 997. Lederer J. The 'Lederer Lenses', a new development in sub-normal vision aids. Aust J Optom 1954;37: 302. See also Aust J Optom, Vol 37 Issue 5 Sep 29, 1956: The Lederer Lens by W G Kett. 'This lens was the first designed in Australia for the specific purpose of aiding those beyond the help of ordinary ophthalmic lenses'. Lederer's career and contribution to optometry is described by Alexander JA. Emeritus Professor Josef Lederer - A pioneer of low vision care Clin Exp Optom 2001; 84: 171-174. His obituary is at Cole BL. Emeritus Professor Josef Lederer 1921-2007 Clin Exper Optom 2007; 90: 388-389. See these items on this web site under the tab 'People who made history'
How Acquired: Donated by Colin Bates
Date Acquired: 14/4/2014
Condition: Good. Box shows some wear on edges.
Location: Archive room. West wall. Unit 5 Drawer 2

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