Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
David M. Lieberman0
Jonathan Grierson0
Date of Patent
March 4, 2008
0Patent Application Number
105585090
Date Filed
May 27, 2004
0Patent Citations Received
Patent Primary Examiner
Patent abstract
Eye measurements taken on a patient being fitted for contact lens will include a refraction test and an additional measurement representing corneal depth variation on the surface of an imaginary cylinder having the same diameter as the lens. This information then used during lens manufacture to produce lens in which the perimeter is not circular and does not lie in a plane, but which drops backwards towards the eye at appropriate points to produce a saddle-shaped perimeter.
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