Patent ID: 7384143

Claim:
A method for converting a desired lens design to a geometry of a contact lens to be produced in a manufacturing system, the method comprises: (1) providing a lens design of a contact lens having a central axis, an anterior surface and an opposite posterior surface; (2) projecting a predetermined number of points within a predetermined surface tolerance onto a surface of the lens design along each of a number of evenly-spaced semi-diameter spokes, each spoke radiating outwardly from the central axis; (3) 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 specified concentricity tolerance, wherein each of the straight lines is obtained by connecting at least three consecutive points; and (4) generating a data file containing information about the geometry of the lens in a form that is interpretable by a computer-controlled manufacturing device.