Determining lens alignment on an eye using optical wavefronts

摘要

An apparatus and method for selecting a lens that accounts for Decentration and/or Rotation Errors. The method includes obtaining results of a first wavefront exam on a patient, including a wavefront map and Zernike polynomials, selecting a first lens that improves vision, obtaining the results of a second wavefront exam including a wavefront map and Zernike polynomials, calculating the Decentration and/or Rotation Errors of the selected lens by calculating a difference between the Zernike polynomails, and selecting a second lens that better corrects accounts for the calculated Decentration and/or Rotation Errors.

主权项

1. A method for selecting a contact lens that accounts for Decentration Error and/or Rotation Error, comprising the steps of:
obtaining results of a first wavefront exam performed on the patient's bare eye, the results including a first wavefront map and a first set of Zernike polynomials; selecting a first contact lens that improves said patient's vision using the results of the first wavefront exam; obtaining results of a second wavefront exam performed on said patient while wearing the selected first contact lens, the second results including a second wavefront map and a second set of Zernike polynomials; calculating Decentration Error or Rotation Error of the selected first lens by calculating a difference between the first and second sets of Zernike polynomials; and selecting a second lens that better accounts for the calculated Decentration Error or Rotation Error of the selected first lens using said calculated difference.