MEASURING APPARATUS AND INSTRUMENTS, NAMELY, MICROSCOPES, PHOTOGRAPHIC APPARATUS AND INSTRUMENTS, NAMELY, CAMERAS, VIDEO CAMERAS AND DIGITAL CAMERAS, OPTICAL APPARATUS AND INSTRUMENTS, NAMELY, VIDEO DISPLAY MONITORS, COMPUTER PRINTERS, LASER PRINTERS, AND DOT MATRIX WRITERS, COMPUTERS, AND COMPUTER SOFTWARE IN THE FIELD OF MEDICAL IMAGING AND MEDICAL DATA ANALYSIS FOR MEASURING CORNEAL THICKNESS AND FOR PHOTOGRAPHING CORNEAL ENDOTHELIUM