1. A method for generating image maps from a 3D image data set, said data set obtained from imaging an eye using an imaging device, said eye having at least one boundary surface associated therewith, said method comprising the steps of: identifying a boundary surface within the 3D image data set; generating a substantially smooth reference surface from the boundary surface; identifying a second surface within the 3D image data set; calculating the distance between points on the smooth reference surface and corresponding points on the second surface; generating an image map of the calculated distances; and displaying the image map.