The laser scanner used (VIVID 700; Konica Minolta Sensing Americas Inc, Ramsey, New Jersey) operates on the principle of a light-stripe triangulation range finder. The subject's facial surface is scanned from top to bottom with a class 2 laser light stripe projected from a distance of at least 1 m. The position of an illuminated surface point relative to the viewpoint is obtained by triangulation. The resolution in the x and y coordinates is 200 × 200 range points per scan. The reliability of this method has been tested and found to be good.5 Scanning of the masks from at least 3 different views, that is, from the front and to each side, was necessary to enable the computer program (Polygon Editing Tool software; Konica Minolta) to reconstruct a 3-dimensional image, or moulage, of each of the masks. One facial scanning may contain 40 000 points, and a polygonal mesh is formed of all these points, representing the facial surface. Cartesian coordinates (x, y, and z) from facial landmarks can be identified and the surface distance between them calculated using computer software (Geomagic Studio, version 9; Geomagic Inc, Research Triangle Park, North Carolina). These landmarks are standardized points used in physical anthropology, and their use in 2- and 3-dimensional analysis of facial shape is well accepted. With the software, 3-dimensional images can be analyzed in full 3 dimensions, superimposed, and rotated for better visualization. This technique, with its accuracy, ease of use, and convenience, has proved particularly useful clinically in documenting and analyzing craniofacial anomalies of various types, particularly cleft lip, in children.6 In analyzing the Lincoln masks, it provided views from any desired angle and enabled measurements to be made so as to quantify the degree and nature of the facial asymmetry.