title: Diffractive bifocal lens designs.
abstract: Modifying the number, width, depth, and shape of the echelettes in a diffractive bifocal lens will influence the image intensity and quality within the zero, first, and higher order images. By appropriately varying these parameters optimal bifocal lens designs may be achieved.
authors.forename: A L
authors.initials: AL
authors.lastname: Cohen
mesh_terms: D003261:Contact Lenses; D004867:Equipment Design; D006801:Humans; D008027:Light; D055095:Optics and Photonics; D011680:Pupil / Q000502:physiology; D012029:Refraction, Ocular; D012542:Scattering, Radiation