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contact lenses slide rule
CONTACT LENSES AND ACCESSORIES
rule; slide rule
Lunelle Soft Contact Lenses
Europe: United Kingdom, England, Surrey, Haslemere
Early 1990s
plastic; card
overall: 210 mm x 56 mm

Contact lens measuring slide rule and fitting guide. White and blue double-sided plastic outer wallet with white laminated cardboard slide marked on one side with a radius conversion table read against the flattest K cornea and also a size gauge and, on the other side, fitting values (powers) as read against a vertex distance measurement of 12 millimetres compared with the relevant spectacle Rx, plus a millimetre rule along one edge. Outer surface overprinted with a promotion for Lunelle brand soft contact lenses.


2004.361

Gift of Andrew Gasson FCOptom, 2004



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