Opticare Pty Ltd PD (Pupillary Distance) and Lens Fitting Rule

Catalogue Number: 3569
Opticare Pty Ltd PD (Pupillary Distance) and Lens Fitting Rule
Category: Equipment
Sub-Category: PD ruler, pupillometer
Corporation: Opticare Pty Ltd
Year Of Publication/Manufacture: c 1995
Time Period: 1940 to 1999
Publisher/Manufacturer: Opticare Pty Ltd
Description Of Item: Set of three identical clear flat flexible plastic rules 187 mm x 28 mm with white laminate applied to one surface, one rounded end and the other tapered at 35 degrees with a 5 mm notch. The lower edge has a 110 degree cut-out 8 mm deep midway along it. Various graduations printed in millimetres allow measurement of pupillary distance, monocular pupillary distance and pupil in a spectacle frame. The words Opticare Pty Ltd, Technology in Focus in blue appear on one face and NASA Optical Multicoat Specialists on the other.
Historical Significance: A dispensing rule designed to enable accurate fitting of lenses to a patient's frame. PD rules of the same basic construction are found in Cat. Nos. 3468 and 3553
How Acquired: Donated by Robert Kaye
Date Acquired: 4-3-2014
Condition: Good, slight yellowing
Location: Archive office. East wall shelves unit 3. Drawer 10

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