title: Diopter and prism diopter.
authors.affiliation: Department of Physics and Astronomy, University of Victoria, B.C. Canada.
authors.forename: G B
authors.initials: GB
authors.lastname: Friedmann
mesh_terms: D005139:Eyeglasses; D006801:Humans; D007394:International System of Units; D055095:Optics and Photonics