Patent ID: 7871163

Claim:
A method for determining the necessary shape change to a cornea of an eye to achieve universal correction of vision, said method being performed with the aid of a computer system including a display device, the method comprising the steps of: modeling the anterior corneal surface as a surface model shaving an M-wave shape such that the surface curvature measured along a curve passing through the optical center varies substantially as a smoothed letter M in relationship to angular orientation about the optical center, where 0° angular orientation is substantially the point closest to the nose on the cornea being modeled and the central dip of the M occurs substantially at a point which is furthest from the nose on the cornea being modeled, corresponding to a 180° orientation, there being maxima of the M at substantially the uppermost and lowermost vertical extremes on the cornea being modeled, to 90° and 270° orientations, respectively; and one of: viewing the surface model on a display device; producing a first signal structured to control another apparatus to shape a contact lens so that an anterior surface of the lens has the M-wave shape; or producing a second signal structured to control a laser device for laser ablation of the cornea so as to impart the M-wave shape to its surface.