Patent ID: 6565209
Filing Date: 2003-05-20
Classification: A61B,G01J,G01M,G06T

Abstract:
A method for measuring aberration in an eye comprising the steps of:focusing collimated light onto a lenslet array, an output thereof comprising a grid formed by edges of the lenslets and a reference spot in at least some members of the grid, each reference spot having a known relationship to the grid member and a centroid; determining a position of each reference centroid and a relationship between the reference centroids; focusing a wavefront emanating from an eye onto the lenslet array, the output from the lenslet array comprising the grid and aberrated eye spots thereon, each eye spot having a centroid; determining a position of each eye spot centroid and a relationship between the eye spot centroids; identifying one known relationship between one reference centroid and the centroid of one eye spot; and determining at least some of the remaining relationships between the reference centroids and the eye spot centroids, the determined relationships providing a measure indicative of the eye aberration.