# US 2021/0330451 A1 · Aspherical 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 2021/0330451 A1 - Document ID: US20210330451A1 - Status: Published application - Kind: A1 - Application number: 17/367,941 - Filed: 2021-07-06 - Published: 2021-10-28 - Earliest claimed: 2012-12-14 - Assignees: Lenstec Barbados Inc. - Applicants: Lenstec Barbados Inc. - Inventors: John Clough - Web page: https://patentgrep.com/patent/US20210330451A1 ## CPC - A61F 2/1618: {Multifocal lenses} - A61F 2/16: Intraocular lenses - A61F 2/1613: {having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus} - A61F 2/164: {Aspheric lenses} - A61F 2/1648: {Multipart lenses} - A61F 2/1637: {Correcting aberrations caused by inhomogeneities; correcting intrinsic aberrations, e.g. of the cornea, of the surface of the natural lens, aspheric, cylindrical, toric lenses} - A61F 2002/1689: {having plate-haptics} - A61F 2250/0053: differing in optical properties - 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 intraocular lens has an anterior lens surface which includes a first optic of a first radius and a second optic of a different radius. The posterior surface of the lens include an aspheric surface. ## Claims ### Claim 1 A multifocal lens comprising: a posterior aspheric lens surface having a first radius of curvature an anterior aspheric lens surface, said anterior aspheric lens surface having a first aspheric distance optic portion having a radius of curvature equal to the first radius of curvature of the posterior lens surface and a second near optic portion having a radius of curvature less than that of the first portion thereby forming a second optic surface on the anterior lens surface, the second near optic portion having an outer perimeter, and a flat surface extending outwardly from the entire radially outer perimeter of the anterior lens near optic portion. ### Claim 2 (depends on 1) A multifocal lens as claimed in claim 1 wherein the flat surface lies in a plane which is parallel to a longitudinal axis of the lens. ### Claim 3 (depends on 1) A multifocal lens as claimed in claim 1 wherein the distance optic portion on the anterior surface is about 50% to 70% of the anterior surface of the lens and the near optic portion is about 50% to 30% of the anterior surface of the lens. ### Claim 4 (depends on 1) The multifocal lens of claim 1 wherein the distance optic portion on the anterior surface is about 60% of the anterior surface and the second near optic portion on the anterior surface is about 40% of the anterior surface. ### Claim 5 (depends on 1) The multifocal lens according to claim 1 wherein the posterior lens surface, the anterior aspherical distance optic portion and the second near optic portion of the anterior aspheric surface each consists of a convex lens surface only. ### Claim 6 A method of improving the eyesight of a human comprising: a. making an incision in an eye of the human; b. removing a natural lens of the eye; and c. implanting an intraocular lens, wherein the intraocular lens comprises: i. a posterior aspheric surface, wherein the posterior surface has a radius of curvature and ii. an anterior aspheric lens surface, said anterior aspheric lens surface having a first aspheric distance optic portion having a radius of curvature equal to the radius of curvature of the posterior surface, iii. a second near optic portion having a radius of curvature less than that of the first aspheric distance optic portion thereby forming a second optic surface on the anterior lens surface, iv. the second near optic portion having an outer perimeter, v. a flat surface extending outwardly from the entire outer perimeter of the anterior lens near optic portion; and vi. a first haptic extending from a top portion of the interocular lens and a second haptic extending from a lower portion of the interocular lens. ### Claim 7 (depends on 6) The method of claim 6, wherein the intraocular lens is made from an acrylic. ### Claim 8 (depends on 6) The method of claim 6 wherein each haptic comprises a first and second leg extending form the lens and a cross member extending between the legs. ### Claim 9 (depends on 8) The method of claim 8 wherein each haptic further a cross member extending between the legs. ### Claim 10 (depends on 9) The method of claim 9 wherein the haptic further comprises a foot-plate located at the distal end of each leg. ### Claim 11 (depends on 6) The method of claim 6 wherein the lens further comprises the flat surface lies in a plane which is parallel to a longitudinal axis of the lens. ### Claim 12 (depends on 6) The method of claim 6 wherein the distance optic portion on the anterior surface is about 50% to 70% of the anterior surface of the lens and the near optic portion is about 50% to 30% of the anterior surface of the lens. ### Claim 13 (depends on 6) The method of claim 6 wherein the distance optic portion on the anterior surface is about 60% of the anterior surface and the second near optic portion on the anterior surface is about 40% of the anterior surface. ### Claim 14 (depends on 6) The method of claim 6 wherein the posterior lens surface, the anterior aspherical distance optic portion and the second near optic portion of the anterior aspheric surface each consists of a convex lens surface only. ### Claim 15 A multifocal lens comprising: a posterior aspheric lens surface having a first radius of curvature an anterior aspheric lens surface, said anterior aspheric lens surface having a first aspheric distance optic portion having a radius of curvature equal to the first radius of curvature of the posterior lens surface and a second near optic portion having a radius of curvature less than that of the first portion thereby forming a second optic surface on the anterior lens surface, the second near optic portion having an outer perimeter. ### Claim 16 (depends on 1) A multifocal lens as claimed in claim 1 wherein the flat surface lies in a plane which is parallel to a longitudinal axis of the lens. ### Claim 17 (depends on 1) A multifocal lens as claimed in claim 1 wherein the distance optic portion on the anterior surface is about 50% to 70% of the anterior surface of the lens and the near optic portion is about 50% to 30% of the anterior surface of the lens. ### Claim 18 (depends on 1) The multifocal lens of claim 1 wherein the distance optic portion on the anterior surface is about 60% of the anterior surface and the second near optic portion on the anterior surface is about 40% of the anterior surface. ### Claim 19 (depends on 1) The multifocal lens according to claim 1 wherein the posterior lens surface, the anterior aspherical distance optic portion and the second near optic portion of the anterior aspheric surface each consists of a convex lens surface only.