Permalens Promotional PD (Pupillary Distance) and Visible Iris Diameter Rule
 Catalogue Number: 3467 Permalens Promotional PD (Pupillary Distance) and Visible Iris Diameter Rule Category: Equipment Sub-Category: PD ruler, pupillometer Corporation: Coopervision Year Of Publication/Manufacture: c1990 Time Period: 1940 to 1999 Place Of Publication/Manufacture: U.S.A. Publisher/Manufacturer: Coopervision Description Of Item: Flexible white plastic rule 186 mm x 35 mm with scale in centimetres with millimetre graduations on both edges, a dioptre to radius of curvature conversion table and Permalens Soft Contact Lenses printed on one face. A Visible Iris Diameter interval scale from 9.0 mm to 13.0 mm in 0.5 mm steps and Permalens oxygen permeable soft contact lenses for extended wear on the opposite face. Historical Significance: Permalens soft contact lenses were manufactured by Coopervision and one of the first contact lenses to be approved by the US Food and Drug Administration (FDA) for extended wear. How Acquired: Donated by Colin Bates Date Acquired: 5-6-2017 Condition: Good Location: Archive room. West wall. Unit 6 Drawer 2 |