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

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