Catalogue Number: 3988
Actitoric Contact Lens Axis Calculator
Sub-Category: Contact lens equipment
Corporation: Hydron Pty Ltd
Year Of Publication/Manufacture: 1990s
Time Period: 1940 to 1999
Place Of Publication/Manufacture: United Kingdom
Publisher/Manufacturer: Hydron Pty Ltd
Description Of Item: Paddle shaped cardboard device in shades of green with a central rotatable central section with a stylised iris imprinted with 5 degree divisions 0 to 180 and 'Monthly disposable contact lens for Astigmatism 'in black and 'Actitoric' in blue. 5 degree divisions are imprinted in red 0 to 180 outside the circumference of rotatable section with 5 degree 30 to 0 to 30 in black centred on the 6 o'clock position. Instructions for use and 'Hydron Toric Experts' are imprinted on the lower part of the paddle. The reverse lists details of Actitoric Lenses, the address of Hydron Australia and the internet address of Hydron UK.
Historical Significance: Markings on Actitoric contact lenses are at 90 degrees to the lens axis (at the 6 o'clock position). As lenses may settle clockwise or anticlockwise form that position, allowance for the rotation must be made when specifying the required lens. This device makes the calculation simpler.
How Acquired: Donated by Colin Bates
Date Acquired: 17/7/2017
Condition: Very Good
Location: Archive office. Pamphlet and ephemera filing cabinet. Drawer 10