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a) Theoretical profiles of the anterior and posterior FIOL surfaces (green line). The red line is the diffractive profile of the FIOL, designed with S = 2 and K = 3 (magnified X5 in the vertical direction in order to show the relative heights of the diffractive steps); this profile was superimposed to a pure spherical profile of a monofocal IOL radius r = 12.42 mm (blue line). b) Interferometric image of the constructed lens.
