Conversion Dial for Measurement of Contact Lenses
 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 |