Linear Plus Bifocal Rigid Gas Permeable Contact Lenses in Flat 'Mailer' Cases
 Catalogue Number: 3496 Linear Plus Bifocal Rigid Gas Permeable Contact Lenses in Flat 'Mailer' Cases Category: Spectacles and lenses Sub-Category: Contact lenses and accessories Corporation: Gelflex Laboratories Year Of Publication/Manufacture: 2005 Time Period: 21st C Place Of Publication/Manufacture: Perth, Western Australia Publisher/Manufacturer: Gelflex Laboratories Description Of Item: Three white flat 'mailer' cases, two 50 mm x 50 mm x 8 mm and one 58 mm x 48 mm x 10 mm each labelled Gelflex Laboratories Australia on the face with a label adhered to the back containing patient's name and lens parameters for the aspheric linear plus bifocal gas permeable rigid lens contained in the right lens compartment. Historical Significance: The linear plus bifocal contact lens was a rigid contact lens based on the design of the executive bifocal spectacle lens with the upper section being the distance correction and the lower section the near correction. The lens was designed to translate upwards on down gaze to locate the reading section on the visual axis. A truncation on the bottom of the lens maintained the lens in the correct orientation on the cornea and assisted translation. How Acquired: Donated by Colin Bates Date Acquired: 19-02-2018 Condition: Good Location: Archive Office. Cabinet One Drawer 16 |