logologo-optometry

Conversion Dial for Measurement of Contact Lenses

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Catalogue Number: 4456
Conversion Dial for Measurement of Contact Lenses
Category: Equipment
Sub-Category: Contact lens equipment
Corporation: Bausch & Lomb
Time Period: 1940 to 1999
Place Of Publication/Manufacture: USA
Publisher/Manufacturer: Bausch & Lomb
Description Of Item: Expandable folding green and white cardboard card with two round rotatable dials on front and back surfaces of central sheet. Converts keratometer readings in dioptres to radii of curvature in millimetres for contact lens selection.Back cover has photograph of an early model Bausch & Lomb keratometer. Complete with envelope. H-786 printed on back of card and on envelope. 160 x 160 mm
How Acquired: Donated by Colin Bates
Date Acquired: 07/08/2017
Condition: Very good
Location: Archive office. Pamphlet and ephemera filing cabinet. Drawer 11

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