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US 11,896,479 B2Granted
Multifocal intraocular lens
AssigneeHanita Lenses Ltd.
InventorsMickael Attia, Alexander Brodsky, Natan Kaplan, Israel Grossinger
Life of this patent
Estimating the term…
Abstract
A multifocal IOL including at least one diffractive surface including a plurality of discrete, adjacent, diffractive, concentric rings, having a radial phase profile cross-section with a near-symmetrical diffractive surface topography, and an odd number, greater than three, of diffractive orders and an asymmetrical distribution of energy flux over the diffractive orders.
Claims30
A multifocal intraocular lens (IOL) comprising,
- at least one diffractive surface including a plurality of discrete, adjacent, diffractive, concentric Fresnel zones;
- said Fresnel zones comprise a first central zone having a repetitive pattern of a first diffractive profile and a second peripheral zone having a repetitive pattern of a second diffractive profile different than the first diffractive profile;
- said first diffractive profile produces an asymmetrical first diffractive energy flux distribution over five diffractive orders:
- −2, −1, 0, +1 and +2;
- and said second diffractive profile produces a second diffractive energy flux distribution over said five diffractive orders, the first diffractive energy flux distribution differing from the second diffractive energy flux distribution as follows:
- in said first diffractive energy flux distribution, said −2 order provides a far vision, said +2 order provides a near vision, said 0 order provides a first intermediate vision, said +1 order provides a second intermediate vision and said −1 order is suppressed;
- and
- in said second diffractive energy flux distribution, said −2 order provides said far vision, said +2 order provides said near vision, said 0 order provides said first intermediate vision, and said −1 order and +1 order are suppressed.
5 more elements
A multifocal intraocular lens (IOL), comprising,
- at least one diffractive surface including a plurality of discrete, adjacent, diffractive, concentric Fresnel zones,
- wherein said Fresnel zones comprise a first central zone having a repetitive pattern of a first diffractive profile and a second peripheral zone having a repetitive pattern of a second diffractive profile different than the first diffractive profile;
- and
- said multifocal IOL is prefabricated such that
- said first diffractive profile produces an asymmetrical first diffractive energy flux distribution over five diffractive orders:
- −2, −1, 0, +1 and +2;
- and said second diffractive profile produces a second diffractive energy flux distribution, over said five diffractive orders, different than said first diffractive energy flux distribution;
- and
- said orders in said first and second diffractive energy flux distributions have a non-zero said energy flux, with the following orders suppressed:
- said −1 order in said first diffractive energy flux distribution and said −1 and said +1 order in said second diffractive energy flux distribution.
7 more elements
Dependencies are inferred from the claim text.