Laser scanning IVCM was performed using the Heidelberg Retina Tomograph II Rostock Corneal Module (RCM; Heidelberg Engineering GmbH, Heidelberg, Germany). Four large sets of 8-bit grayscale images (384 by 384 pixels) were obtained from three subjects with normal corneas (containing 373, 640, 706, and 846 images, respectively). For each image set, a completed montage was available as an encapsulated postscript (EPS) file. This file contained a manually created montage by an expert user (DVP) (using Macromedia Freehand 10.0, Townsend, San Francisco, CA). The identities, dimensions, and positions of the component images were extracted by computer processing codes written using MATLAB (The MathWorks, Inc., Natick, MA).