The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 2008
Filed:
Jul. 23, 2003
William Jordan Hall, Atlanta, GA (US);
Joseph Michael Lindacher, Lawrenceville, GA (US);
Gilberto Hernandez, Aibonito, PR (US);
Nelson David Baity, Horse Shoe, NC (US);
Donald G. Mckillop, Casselberry, FL (US);
William Jordan Hall, Atlanta, GA (US);
Joseph Michael Lindacher, Lawrenceville, GA (US);
Gilberto Hernandez, Aibonito, PR (US);
Nelson David Baity, Horse Shoe, NC (US);
Donald G. McKillop, Casselberry, FL (US);
Novartis AG, Basel, CH;
Abstract
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.