Designed by Campbell and Obstfeld to take frame and multifocal measurements, the City Rule is an optical ruler that enables the user to accurately measure the following:
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Boxed Centre
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Boxed Lens Size
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Conventional Inset
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Geometrical Centre of Segment
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Geometrical Inset
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Monocular Centration Distance (This is not a term or measurement defined in a British Standard)
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Fitting Height
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Segment Bottom Position
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Segment Depth
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Segment Diameter
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Segment Height
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Segment Size
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Segment Top Position
Supplied with instruction manual
The City Rule
SKU: DI002000
£19.00Price
DI002000