Scanning and processing using optical coherence tomography

An OCT imaging system, comprising:

• an OCT imager that acquires OCT data with a scan pattern centered on an eye cornea that includes n radial scans repeated r times, c circular scans repeated r times, and n* raster scans where the scan pattern is repeated m times, where each scan includes a A-scans, and where n is an integer that is 0 or greater, r is an integer that is 1 or greater, c is an integer that is 0 or greater, n* is an integer that is one or greater, m is an integer that is 1 or greater, and a is an integer greater than 1, the values of n, r, c, n*, and m being chosen to provide OCT data;
• a corneal topography imager that acquires a corneal topography image;
• and
• a computer that processes the OCT data and the corneal topography image, the processing including
• obtaining a pachymetry map from the OCT data,
• obtaining a corneal anterior power map from corneal anterior image,
• registering the pacymetry map with the corneal topography power map,
• generating a corneal posterior surface, and
• generating a total corneal power map.