Digital Corneal Topography Restoration Algorithm

Corneal Topography has become an indispensable assistant tool in the modern clinical ophthalmic operation. The application of optical interference measurement with high accuracy to examine the corneal contour map is a new trend in this field. The key techniques are to process the interferogram and to reconstruct the wavefront. Thus it is of great significance to find a digital comeal topography reconstruction algorithm based on Radial Shearing Interference.The reconstruction algorithm from radial shearing interferogram is profoundly researched in the thesis. First, based on the principle of Radial Shearing Interference, constructing a radial shearing interferogram of Corneal Topography is derived. Second, making use of the Zernike polynomials fitting algorithm and numerical iterative computation, the simulation reconstruction of Corneal Topography is researched. A deeply analysis of the result shows that the self-made program can meet the demand of metrical accuracy. Third, by reconstructing the laboratory detected Corneal Topography, the wavefront contour and the Zernike polynomials coefficients are achieved. The conclusion shows that the research on digital corneal topography reconstruction algorithm has been fundamentally fulfilled.