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Purpose: Multifocal contact lenses have a variable power map that is typically radial. The prescription of these lenses is given as a Sphere plus Addition values in diopters. They are calculated by assigning different radial rings of the lens to different mean power values (near and far vision zones). Depth of focus (DOF) should be high in order to focus both images on the retina. This calculation...
Purpose: Spherical multifocal contact lenses are typically designed with a rotationally symmetrical power profile. Imperfections in the raw material, manufacturing and measurement process can break this symmetry, altering the intended lens design. The purpose of this work is to develop a method to separate the intended symmetric design profile from the asymmetries and to give the spatial distribution...
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