# US 12,111,517 B2 · Multifocal ophthalmic lenses and related methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,517 B2 - Document ID: US12111517B2 - Status: Granted - Kind: B2 - Application number: 18/234,389 - Filed: 2023-08-16 - Published: 2023-12-07 - Granted: 2024-10-08 - Earliest claimed: 2020-04-30 - Assignees: CooperVision International Limited - Applicants: CooperVision International Limited - Inventors: Martin Webber; Percy Lazon de la Jara - Web page: https://patentgrep.com/patent/US12111517B2 ## CPC - G02C 7/042: {Simultaneous type} - G02C 7/06: bifocal; multifocal {; progressive (G02C7/041 takes precedence)} - A61F 2/1618: {Multifocal lenses} - G02C 7/044: {Annular configuration, e.g. pupil tuned} - G02C 7/066: {Shape, location or size of the viewing zones} - G02C 2202/24: Myopia progression prevention - 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) - 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) ## Abstract A multifocal ophthalmic lens wherein a first surface of the lens is shaped to form a surface power map and a second surface of the lens is shaped to form a second surface power map. The first surface power map and the second surface power map together form a lens power map. The first surface power map, the second surface power map, or the lens power map comprises a spiral. The spiral has a variation across at least a portion of the lens. Methods of making and using such lenses are also provided. ## Claims ### Claim 1 A multifocal ophthalmic lens, wherein: a first surface of the lens is shaped to form a first surface power map; a second surface of the lens is shaped to form a second surface power map; the first and second surface power maps together form a lens power map; the first surface power map, the second surface power map, or the lens power map comprises a spiral having a first periodic component having a constant period that is greater than 100 microns in a radial direction extending outwards from the centre of the portion, and a second periodic component in an azimuthal direction about the centre of the portion, the spiral having a variation across at least a portion of the lens. ### Claim 2 (depends on 1) The multifocal ophthalmic lens according to claim 1, wherein the second periodic component has a constant period. ### Claim 3 (depends on 1) The multifocal ophthalmic lens according to claim 1, wherein the first periodic component and/or the second periodic component varies as one of a square wave, a sinusoid, and a rounded square wave. ### Claim 4 (depends on 2) The multifocal ophthalmic lens according to claim 2, wherein the second periodic component has a period of greater than 6 degrees. ### Claim 5 (depends on 1) The multifocal ophthalmic lens according to claim 1, wherein the variation of the spiral comprises an offset in power, the offset changing according to a radial distance from the centre of the portion. ### Claim 6 (depends on 5) The multifocal ophthalmic lens according to claim 5, wherein a peak power of one or more arms of the spiral varies according to one or both of: a radial distance from the centre of the portion and an azimuthal position about the centre of the portion. ### Claim 7 (depends on 1) The multifocal ophthalmic lens according to claim 1, wherein: a peak power of each arm of the spiral does not vary with radial distance from the centre of the portion; and the peak power of at least one arm of the spiral differs from that of the other arms. ### Claim 8 (depends on 1) The multifocal ophthalmic lens according to claim 1, wherein each of the first surface power map and the second surface power map vary smoothly across the portion. ### Claim 9 (depends on 1) The multifocal ophthalmic lens according to claim 1, wherein: the portion of the lens comprises a central region and an outer region, the outer region surrounding the central region; the lens power map within the outer region comprises the spiral; and the lens power map does not vary periodically within the central region. ### Claim 10 (depends on 9) The multifocal ophthalmic lens according to claim 9, wherein the central region has a diameter of less than 30% of that of the portion. ### Claim 11 (depends on 9) The multifocal ophthalmic lens according to claim 9, wherein lens is a contact lens and the central region is smaller than the minimum pupil size of a wearer of the lens. ### Claim 12 (depends on 9) The multifocal ophthalmic lens according to claim 9, wherein: the lens comprises a transition region, the transition region surrounding the central region and the outer region surrounding the transition region; and the lens power map varies such that the transition region provides a smooth transition between the central zone and the outer zone. ### Claim 13 (depends on 1) The multifocal ophthalmic lens according to claim 1, wherein a twist rate of the spiral varies according to a radial distance from the centre of the portion. ### Claim 14 (depends on 1) The multifocal ophthalmic lens according to claim 1, wherein a width of one or more arms of the spiral differs from a corresponding width of the other arms of the spiral. ### Claim 15 (depends on 14) The multifocal ophthalmic lens according to claim 14, wherein, at a pre-determined radial distance from the centre of the portion, the spiral changes its direction of rotation. ### Claim 16 (depends on 1) The multifocal ophthalmic lens according to claim 1, wherein the ophthalmic lens is a contact lens, a spectacle lens, or an intraocular lens. ### Claim 17 A method of manufacturing a multifocal ophthalmic lens, the method comprising: operating a lathe to shape a first surface of one of: a lens, a mould for a lens, or an insert for manufacturing a mould for a lens to form a first surface power map; operating a lathe to shape a second surface of the lens, mould, or insert to form a second surface power map; wherein: the combination of the first and second surface power maps forms a lens power map; the first surface power map, the second surface power map, or the lens power map comprises a spiral having a first periodic component having a substantially constant period that is greater than 100 microns in a radial direction extending outwards from the centre of the portion, and a second periodic component in an azimuthal direction about the centre of the portion, the spiral having a variation across at least a portion of the lens, mould or insert. ### Claim 18 (depends on 1) A method of improving vision of a person, the method comprising: providing a multifocal ophthalmic lens according to claim 1 to a person in need of improved vision. ### Claim 19 (depends on 1) The multifocal ophthalmic lens according to claim 1, in which the ophthalmic lens is a centre distance contact lens, or a centre near contact lens. ### Claim 20 (depends on 9) The multifocal ophthalmic lens according to claim 9, wherein the central region has an optical power corresponding to a distance vision correction. ### Claim 21 (depends on 9) The multifocal ophthalmic lens according to claim 9, wherein the central region has an optical power corresponding to a near vision correction.