Squares of perspex (PMMA) for scleral contact lenses
 Catalogue Number: 2174 Squares of perspex (PMMA) for scleral contact lenses Category: Spectacles and lenses Sub-Category: Contact lenses and accessories Year Of Publication/Manufacture: Late 1970s Time Period: 1940 to 1999 Place Of Publication/Manufacture: Taiwan Publisher/Manufacturer: Hsin Hwa Chemical Co Ltd Description Of Item: 23 squares (65 x 65 mm) of polymethyl methacrylate (PMMA or perspex), 10 taped as a packet, each protected by transparent blue plastic film on one side, 13 loose, protected by brown paper on both sides. Those with protective brown paper are marked in green print CAST ACRYLIC (XXX Chinese character) HSINHWA CO., LTD. HHL logo/ ISO 9002 CERTIFICATE NO Q 2 7656 001 Historical Significance: These were source materials for making scleral contact lenses using a plaster cast of a patient's eye. The donor, John Strachan, was a leading contact lens practitioner in Melbourne, Australia. Hsin Hwa Chemical Co Ltd is a Taiwan company established in 1973 to make cast acrylic sheet How Acquired: Donated by John P F Strachan, Member of the College Date Acquired: Feb 2013 Condition: Good Location: Archive room. West wall. Unit 6 Drawer 2 |