Invention Grant
US07441894B2 Pseudo-accommodative IOL having diffractive zones with varying areas 有权
具有变区的衍生区的假调节性IOL

Pseudo-accommodative IOL having diffractive zones with varying areas
Abstract:
In one aspect of the invention, a trifocal ophthalmic lens is disclosed that includes an optic having at least one optical surface, and a plurality of diffractive zones that are disposed on a portion of that surface about an optical axis of the optic. At least two of those diffractive zones have different areas so as to cause broadening of optical energy profiles at a near and a far foci of the diffractive zones for generating an intermediate focus.
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