Pair of SOLA Optical Pupillary Distance (PD) Rules

Catalogue Number: 3640
Pair of SOLA Optical Pupillary Distance (PD) Rules
Category: Equipment
Sub-Category: PD ruler, pupillometer
Corporation: SOLA Optical
Year Of Publication/Manufacture: c 1990
Time Period: 1940 to 1999
Place Of Publication/Manufacture: Adelaide
Publisher/Manufacturer: SOLA Optical
Description Of Item: Pair of identical flexible plastic PD rules 156 mm x 22 mm with a 10 mm x 2 mm notch at the end of one edge and a 35 mm x 2 mm notch and a round section 22 mm long and 8 mm deep on the other edge. The straight edge has a centimetre scale with millimetre graduations on each face. The opposite edge has graduations for frame bridge and eyesize measurements in 2 mm steps. The word SOLA and a green and white SOLA logo appear on both faces.
Historical Significance: SOLA (Scientific Optical Laboratories Australia) was founded in 1960. Its foundation was driven by the technical genius of Donald Schultz (See Watkins RD Profile of Donald Herbert Schultz Clin Exp Optom 2004; 87: 187-190) who had for some time been interested in the use of CR39 for the manufacture of ophthalmic lenses. SOLA became a highly successful international company for the production of CR39 lenses. CR-39, or allyl diglycol carbonate (ADC) was first used for spectacle lenses by Armorlite Lens Company in California in 1947. Rules of this type were provided to optometrists and optical dispensers as promotional material.
How Acquired: Donated by Robert Kaye
Date Acquired: 4-3-2014
Condition: Good, one slightly discoloured
Location: Archive office. East wall shelves unit 3. Drawer 10

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