Rigid Contact Lenses in Flat 'Mailer' Case
 Catalogue Number: 3963 Rigid Contact Lenses in Flat 'Mailer' Case Category: Spectacles and lenses Sub-Category: Contact lenses and accessories Year Of Publication/Manufacture: 1990s Time Period: 1940 to 1999 Description Of Item: Translucent flat 'mailer' case 50 mm x 50 mm x 8 mm with a label adhered to the face containing patient name and lens parameters for the Tetracurve lens of grey tinted PMMA material contained in the left compartment. Lens power Plano Historical Significance: PMMA (Poly methyl methacrylate acrylate) a material of Dk 0 and refractive index1.429 was the original plastic used for the manufacture of contact lenses. It has been superseded in most cases by gas permeable materials. How Acquired: Donated by Colin Bates Date Acquired: 20/11/2017 Condition: Good Location: Archive Office. Cabinet One Drawer 16 |