Computerized method for rotational autokeratoplasty.

The aim of our study was to formulate the procedure of rotational autokeratoplasty; that is, design the computer system and software necessary to automatically define the parameters of the problem. To achieve this, we used a CCD camera (Nikon) and a microcomputer with an integrated IMAGENIA (Biocom) interface software card (512 x 512 pixels and 100 gray levels), which permitted acquisition and digitalization of photographs of the lesioned cornea. Digitization of the image allowed us to determine the coordinates (x,y) of the points that lay on the lesion periphery as well as the coordinates of the corneal center; i.e., the geometric center of the cornea. The center of trephination and the optimal diameter of trephination can then be calculated as a function of a point situated on the lesion edge.