title: HP program for the center thickness of convex spectacle lenses.
abstract: A HP program for a quick and precise determination of the center thickness of convex spectacle lenses is presented. The program uses 150 lines of programming and 10 storage registers. With the exception of the center thickness and one of the surface powers all the other parameters must be known.
mesh_terms: D005139:Eyeglasses; D007909:Lenses; D055095:Optics and Photonics; D012984:Software