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公开(公告)号：EP1552336A1
公开(公告)日：2005-07-13
申请号：EP03771080.3
申请日：2003-07-23
申请人： Novartis AG , Novartis Pharma GmbH
发明人： HALL, Jordan, William , LINDACHER, Joseph, Michael , HERNANDEZ, Gilberto , BAITY, Nelson, David , MCKILLOP, Donald, G.
CPC分类号： G02C7/024 , B29D11/00038 , G02B3/00 , G02C7/04 , G02C7/048
摘要： The present invention provides a method for converting a desired lens design to a geometry of a contact lens, preferably a customized contact lens or a contact lens having a complex surface design, to be produced in a computer-controlled manufacturing system. The method comprises: providing a lens design of a contact lens having a central axis, an anterior surface and an opposite posterior surface; projecting a predetermined number of points within a predetermined surface tolerance onto a surface of the lens design along each of a desired number of evenly-spaced semi-diameter spokes, each spoke radiating outwardly from the central axis; and for each of the spokes, generating a semi-meridian which is continuous in first derivative and includes a series of arcs and optionally straight lines, wherein each arc is defined by fitting at least three consecutive points into a spherical mathematical function within a desired concentricity tolerance, wherein each of the straight lines is obtained by connecting at least three consecutive points.
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公开(公告)号：EP1552336B1
公开(公告)日：2008-10-01
申请号：EP03771080.3
申请日：2003-07-23
申请人： Novartis AG
发明人： HALL, Jordan, William , LINDACHER, Joseph, Michael , HERNANDEZ, Gilberto , BAITY, Nelson, David , MCKILLOP, Donald, G.
CPC分类号： G02C7/024 , B29D11/00038 , G02B3/00 , G02C7/04 , G02C7/048
摘要： The present invention provides a method for converting a desired lens design to a geometry of a contact lens, preferably a customized contact lens or a contact lens having a complex surface design, to be produced in a computer-controlled manufacturing system. The method comprises: providing a lens design of a contact lens having a central axis, an anterior surface and an opposite posterior surface; projecting a predetermined number of points within a predetermined surface tolerance onto a surface of the lens design along each of a desired number of evenly-spaced semi-diameter spokes, each spoke radiating outwardly from the central axis; and for each of the spokes, generating a semi-meridian which is continuous in first derivative and includes a series of arcs and optionally straight lines, wherein each arc is defined by fitting at least three consecutive points into a spherical mathematical function within a desired concentricity tolerance, wherein each of the straight lines is obtained by connecting at least three consecutive points.
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