# US 11,896,479 B2 · Multifocal intraocular lens > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,896,479 B2 - Document ID: US11896479B2 - Status: Granted - Kind: B2 - Application number: 18/138,224 - Filed: 2023-04-24 - Published: 2023-08-17 - Granted: 2024-02-13 - Earliest claimed: 2018-09-13 - Assignees: Hanita Lenses Ltd. - Applicants: Hanita Lenses Ltd. - Inventors: Mickael Attia; Alexander Brodsky; Natan Kaplan; Israel Grossinger - Web page: https://patentgrep.com/patent/US11896479B2 ## CPC - A61F 2/1618: {Multifocal lenses} - A61F 2/1654: {Diffractive lenses} - A61F 2/1656: {Fresnel lenses, prisms or plates} - G02B 5/1876: {Diffractive Fresnel lenses; Zone plates; Kinoforms (G02B5/1842, G02B5/1847 take precedence; optical systems having diffractive correction means G02B27/0037; Fresnel lenses operating by refraction G02B3/08)} - G02B 27/0012: {Optical design, e.g. procedures, algorithms, optimisation routines} - G02B 27/4205: {having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant} - G02C 7/028: {Special mathematical design techniques} - G02C 7/044: {Annular configuration, e.g. pupil tuned} - G02C 2202/20: Diffractive and Fresnel lenses or lens portions - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00) ## 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The multifocal IOL according to claim 1, wherein energy flux of said −2 order produced by said first zone is greatest, of said five orders, produced by said first zone. ### Claim 3 (depends on 1) The multifocal IOL according to claim 1, wherein energy flux of said −2 order produced by said second zone is greater than energy flux of said +2 order produced by said second zone. ### Claim 4 (depends on 1) The multifocal IOL according to claim 1, wherein said orders −2, 0, and +2 produced by said second zone have a declining energy flux with increasing order number. ### Claim 5 (depends on 1) The multifocal IOL according to claim 1, wherein at least one of said first and second diffractive profiles is asymmetrical. ### Claim 6 (depends on 1) The multifocal IOL according to claim 1, wherein at least one of said first and second diffractive profiles has an asymmetrical double-peaked geometry. ### Claim 7 (depends on 6) The multifocal IOL according to claim 6, wherein said first diffractive profile is characterized by a near-symmetrical local diffractive surface topography. ### Claim 8 (depends on 1) The multifocal IOL according to claim 1, wherein said diffractive surface comprises diffractive steps. ### Claim 9 (depends on 8) The multifocal IOL according to claim 8, wherein said steps are partially inside and partially outside a base curvature of the IOL. ### Claim 10 (depends on 8) The multifocal IOL according to claim 8, wherein a thickness of the IOL is variable and a curvature of the IOL is maintained among said steps. ### Claim 11 (depends on 8) The multifocal IOL according to claim 8, wherein a thickness of the IOL is variable and a curvature of the IOL is variable among said steps. ### Claim 12 (depends on 8) The multifocal IOL according to claim 8, wherein a height of the diffractive surface topography of said second peripheral zone is maintained constant when advancing radially outwards in respect to the center height of the IOL. ### Claim 13 (depends on 1) The multifocal IOL according to claim 1, with an efficiency of greater than 90% in said five diffractive orders. ### Claim 14 (depends on 13) The multifocal IOL according to claim 13, wherein said efficiency is at least 93%. ### Claim 15 (depends on 1) The multifocal IOL according to claim 1, wherein a transition from said first zone to said second zone occurs at a radius of approximately 1.228 mm. ### Claim 16 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. ### Claim 17 (depends on 16) The multifocal IOL according to claim 16, wherein energy flux of said −2 order produced by said first zone is greatest, of said five orders, produced by said first zone. ### Claim 18 (depends on 16) The multifocal IOL according to claim 16, wherein energy flux of said −2 order produced by said second zone is greater than energy flux of said +2 order produced by said second zone. ### Claim 19 (depends on 16) The multifocal IOL according to claim 16, wherein said orders −2, 0, and +2 produced by said second zone have a declining energy flux with increasing order number. ### Claim 20 (depends on 16) The multifocal IOL according to claim 16, wherein at least one of said first and second diffractive profiles is asymmetrical. ### Claim 21 (depends on 16) The multifocal IOL according to claim 16, wherein at least one of said first and second diffractive profiles has an asymmetrical double-peaked geometry. ### Claim 22 (depends on 21) The multifocal IOL according to claim 21, wherein said first diffractive profile is characterized by a near-symmetrical local diffractive surface topography. ### Claim 23 (depends on 16) The multifocal IOL according to claim 16, wherein said diffractive surface comprises diffractive steps. ### Claim 24 (depends on 23) The multifocal IOL according to claim 23, wherein said steps are partially inside and partially outside a base curvature of the IOL. ### Claim 25 (depends on 23) The multifocal IOL according to claim 23, wherein a thickness of the IOL is variable and a curvature of the IOL is maintained among said steps. ### Claim 26 (depends on 23) The multifocal IOL according to claim 23, wherein a thickness of the IOL is variable and a curvature of the IOL is variable among said steps. ### Claim 27 (depends on 23) The multifocal IOL according to claim 23, wherein a height of the diffractive surface topography of said second peripheral zone is maintained constant when advancing radially outwards in respect to the center height of the IOL. ### Claim 28 (depends on 16) The multifocal IOL according to claim 16, with an efficiency of greater than 90% in said five diffractive orders. ### Claim 29 (depends on 28) The multifocal IOL according to claim 28, wherein said efficiency is at least 93%. ### Claim 30 (depends on 16) The multifocal IOL according to claim 16, wherein a transition from said first zone to said second zone occurs at a radius of approximately 1.228 mm.