Employing diffractive structure to reduce soft contact lens variation

Patent metadata

Field	Value
Publication number	US-11360325-B2
Application number	US-201916272019-A
Country	US
Kind code	B2
Filing date	Feb 11, 2019
Priority date	Feb 11, 2019
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

An ophthalmic lens may comprise a main body comprising an optic zone and a peripheral zone disposed adjacent the optic zone, wherein the optic zone comprises a refractive structure that exhibits a first optical power and a diffractive structure disposed within the optic zone, wherein the diffractive structure exhibits a second optical power, wherein the ophthalmic lens is associated with a first target SKU optical power.

First claim

What is claimed is:

1. A set of soft contact lenses adapted to be placed against an eye of a wearer, comprising:
a plurality of soft contact lenses that provide a total sphere power correction ranging from a negative diopter correction to a positive diopter correction, wherein each of said contact lenses within said set further comprises
a main body comprising an optic zone and a peripheral zone disposed adjacent the optic zone, wherein the optic zone comprises a refractive structure that exhibits a first optical power of −3D for all contact lenses within the set; and for lenses other than −3D total optical power, said lens further comprises a diffractive structure disposed adjacent or within the optic zone, wherein the diffractive structure exhibits a second optical power and is disposed from approximately 2 mm from a lens center to approximately 6 mm from the lens center;

wherein the first optical power and the second optical power combine to create the total sphere power correction.

2. The set according to claim 1 , wherein said range is from at least −9 diopters to +4 diopters.

3. The set of lenses according to claim 1 , wherein the diffractive structure is disposed at least partially within the optic zone and is not uniformly distributed across the optic zone.

4. The set of lenses according to claim 3 , wherein the diffractive structure within the optic zone is constructed such that its diffractive power is distributed to increase as distance from a lens center increases.

5. The set of lenses according to claim 1 , wherein a diameter of the optic zone is of a value within the range of approximately 7-9 mm.

6. The set of lenses according to claim 2 , wherein the diffractive structure is disposed at least partially within the optic zone and is not uniformly distributed across the optic zone.

7. The set of lenses according to claim 6 , wherein the diffractive structure within the optic zone is constructed such that its diffractive power is distributed to increase as distance form a lens center increases.

8. The set of lenses according to claim 1 , wherein the contact lens has opposing first and second surfaces, and wherein the refractive and diffractive structures are both disposed on the same one of the first and second surfaces.

Assignees

• Johnson & Johnson Vision Care

Inventors

• Chen Minghan
• Wooley C Benjamin

Classifications

• G02C2202/20

  Diffractive and Fresnel lenses or lens portions · CPC title

• G02C7/06

  bifocal; multifocal {; progressive (G02C7/041 takes precedence)} · CPC title

• G02C7/041 Primary

  bifocal; multifocal · CPC title

• G02C7/044

  Annular configuration, e.g. pupil tuned · CPC title

• G02C2202/08

  Series of lenses, lens blanks · CPC title