Patent Number: 6,569,154

Title: Optimization of ablation correction of an optical system and associated methods

Abstract: An optical correction system for correcting visual defects of an eye includes a wavefront analyzer responsive to a wavefront emanating from an eye for determining an optical path difference between a reference wave and the wavefront. A converter provides an optical correction based on the path difference and on a radially dependent ablation efficiency. The efficiency correction uses a compensating polynomial of the form A+B.rho.+C.rho..sup.2 +D.rho..sup.3 + . . . +X.rho..sup.n, where .rho. is a normalized radius measured from a central portion of the cornea, reaching a value of 1 at an outer edge of the optical correction zone. A laser beam is directed to the cornea that has power sufficient for ablating corneal material. The optical correction is achieved by the removal of a selected amount of the corneal material to create a desired corneal shape change based on the optical correction.

Inventors: Campin; John Alfred (Orlando, FL), Pettit; George H. (Maitland, FL)

Assignee: Alcon, Inc.

International Classification: A61F 9/01 (20060101); A61F 9/007 (20060101); A61B 5/103 (20060101); A61B 017/00 ()

Expiration Date: 05/27/2020