# US 2014/0194986 A1 · Iol with varying correction of chromatic aberration

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0194986 A1
- Document ID: US20140194986A1
- Status: Published application
- Kind: A1
- Application number: 14/203,780
- Filed: 2014-03-11
- Published: 2014-07-10
- Earliest claimed: 2009-06-09
- Assignees: Novartis AG
- Applicants: Novartis AG
- Inventors: XIAOXIAO ZHANG; COSTIN EUGENE CURATU; KRISHNAKUMAR VENKATESWARAN; DANIEL ROBERT CARSON; MUTLU KARAKELLE; XIN HONG; YUEAI LIU
- Web page: https://patentgrep.com/patent/US20140194986A1

## CPC

- A61F 2/1654: {Diffractive 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}
- G02C 7/041: {bifocal; multifocal}
- G02C 2202/20: Diffractive and Fresnel lenses or lens portions
- G02C 2202/22: Correction of higher order and chromatic aberrations, wave front measurement and calculation
- 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)
- 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

An ophthalmic lens includes an optical filter operable to filter out at least visible light having a wavelength less than 450 nm. The lens also includes a first diffractive structure adapted to produce a focus for visible light in a first wavelength range above 550 nm and to reduce longitudinal chromatic aberration to less than one diopter for incoming visible light in the first wavelength range. The lens also includes a second diffractive structure outside the first diffractive structure in a radial direction and adapted to produce a focus for visible light in a second wavelength range between 450 nm and 550 nm. The second diffractive structure is also adapted to reduce longitudinal chromatic aberration for incoming visible light in the second wavelength range to less than one diopter while allowing longitudinal chromatic aberration in the first wavelength range in an amount greater than the first diffractive structure.

## Claims

### Claim 1

A method of manufacturing an ophthalmic lens, comprising:
determining a first profile for a first diffractive structure adapted to produce a focus for visible light in a first wavelength range above 550 nm and to reduce longitudinal chromatic aberration to less than one diopter for incoming visible light in the first wavelength range;
determining a second profile for a second diffractive structure outside the first diffractive structure in a radial direction and adapted to produce a focus for visible light in a second wavelength range between 450 nm and 550 nm and to reduce longitudinal chromatic aberration for incoming visible light in the second wavelength range to less than one diopter while allowing longitudinal chromatic aberration in the first wavelength range in an amount greater than the first diffractive structure;
forming an ophthalmic lens with the first profile and the second profile and incorporating an optical filter operable to filter out at least visible light having a wavelength less than 450 nm.

### Claim 2 (depends on 11)

The method of claim 11, wherein a diffractive efficiency of the first diffractive structure is 100% for a design wavelength of 580 nm.

### Claim 3 (depends on 11)

The method of claim 11, wherein a diffractive efficiency of the second diffractive structure is 100% for a design wavelength of 505 nm.

### Claim 4 (depends on 11)

The method of claim 11, wherein the lens has an overall power up to 6 D and the first diffractive structure and the second diffractive structure each have a respective diffractive power less than 3 D.

### Claim 5 (depends on 11)

The method of claim 11, wherein the lens has an overall power up to 21 D and the first diffractive structure and the second diffractive structure each have a respective diffractive power less than 4.25 D.

### Claim 6 (depends on 11)

The method of claim 11, wherein the optical filter comprises a UV-absorbing material.

### Claim 7 (depends on 11)

The method of claim 11, wherein the ophthalmic lens is formed from a cross-linked copolymer of 2-phenylethyl acrylate and 2-phenylethyl methacrylate.

### Claim 8 (depends on 11)

The method of claim 11, wherein the focus of the first diffractive structure coincides with the focus of the second diffractive structure.

### Claim 9 (depends on 11)

The method of claim 11, wherein the focus of the second diffractive structure is a distance-vision focus.