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US 12,544,218 B2Granted
Lenses having multi-ring design for vision treatment
AssigneeAMO Groningen B.V.
InventorsAixa Alarcon Heredia, Miguel Faria Ribeiro, Franck Gounou, Patricia A. Piers, Hendrik Weeber, Carmen Canovas Vidal, Robert Rosen
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Abstract
Apparatuses, systems and methods for providing improved ophthalmic lenses, particularly intraocular lenses (IOLs), include features for providing improved extended depth of focus lenses. Exemplary ophthalmic lenses can include an optic including a diffractive profile including multiple rings, with the rings having step heights corresponding to a desired performance of the optic and configured to reduce adverse optical effects of the diffractive profile.
Claims11
An intraocular lens (IOL) comprising:
- an optic comprising an anterior optical surface, a posterior optical surface, and an outer periphery, wherein one of the optical surfaces comprises a diffractive profile including an interior echelette having a step height of no more than 0.2 wavelengths and an outer echelette having a step height of more than 0.2 wavelengths and less than two wavelengths, and a refractive zone extending radially outward from the outer echelette to the outer periphery of the optic and adjacent to the outer echelette,
- wherein the optic includes a central zone and the interior echelette is positioned at the central zone,
- wherein the outer echelette is adjacent to the interior echelette,
- wherein the interior echelette has a width corresponding to a power of between 1 diopter and 5 diopters.
1 more element
Dependencies are inferred from the claim text.