Patent Number: 7,712,900

Title: Wavefront characterization of corneas

Abstract: Apparatus for determining whether cornea (vitro or in vivo) has been modified (surgically or otherwise). The method includes the steps of: passing a beam of collimated light through the cornea to produce a distorted wavefront; determining the characteristics of the distorted wavefront; and analyzing the distorted wavefront for characteristics that identify the presence of a modification. The analysis of the distorted wavefront can be for the presence of higher order aberrations, or Gausian characteristics which are indicative of modifications. The method includes the steps of providing an optical system that has a pupil plane and an image plane at a detector; positioning the cornea in the pupil plane; passing a collimated beam of light through the cornea to produce at least two images in the image plane; determining the characteristics of the distorted wavefront; and analyzing the distorted wavefront for characteristics that identify the presence of a modification.

Inventors: Otten; Leonard John (Placitas, NM), Erry; Gavin R. G. (Malvern, Worcestershire, GB), Woods; Simon C. (Cheltenham, Gloucestershire, GB), Harrison; Paul (Rio Rancho, NM)

Assignee:

International Classification: A61B 3/10 (20060101)

Expiration Date: 5/11/12018