# US 12,007,626 B2 · Spectacle lens and method for designing the same

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- Number: US 12,007,626 B2
- Document ID: US12007626B2
- Status: Granted
- Kind: B2
- Application number: 17/423,317
- Filed: 2020-06-18
- Published: 2022-04-21
- Granted: 2024-06-11
- Earliest claimed: 2019-06-25
- Assignees: Hoya Lens Thailand Ltd.
- Applicants: Hoya Lens Thailand Ltd.
- Inventors: Toshiaki Sonehara; Hua Qi
- Web page: https://patentgrep.com/patent/US12007626B2

## CPC

- G02C 7/022: {Ophthalmic lenses having special refractive features achieved by special materials or material structures (G02C7/049 takes precedence)}
- G02C 7/024: {Methods of designing ophthalmic lenses}
- 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)

## Abstract

An object is to not lose an effect of suppressing the progression of myopia or hyperopia even in a peripheral area of a spectacle lens. A spectacle lens and a technology related thereto are provided, the spectacle lens including: a first area that causes light rays incident on an object-side face of the lens to exit from an eyeball-side face of the lens and to converge at a predetermined position A on a retina of a wearer; and a plurality of second areas configured to cause light rays to converge at a position B on the object side or a position C on the distal side relative to the position A, wherein, in the first area in a peripheral area of the spectacle lens that is a radius range from 4.5 mm to 25 mm of a lens center, a refractive power error in a meridional direction and a refractive power error in a sagittal direction have values that cause light rays to converge in a direction extending from a vicinity of the position A toward the position B if the second areas cause the light rays to converge at the position B, or have values that cause light rays to converge in a direction extending from the vicinity of the position A toward the position C if the second areas cause the light rays to converge at the position C.

## Claims

### Claim 1

A spectacle lens comprising:
a first area that causes light rays incident on an object-side face of the lens to exit from an eyeball-side face of the lens and to converge at a predetermined position A on a retina of a wearer; and
a plurality of second areas configured to cause light rays to converge at a position B on the object side or a position C on the distal side relative to the position A,
wherein, in the first area in a peripheral area of the spectacle lens that is a radius range from 4.5 mm to 25 mm of a lens center, a refractive power error in a meridional direction and a refractive power error in a sagittal direction have values that cause light rays to converge in a direction extending from a vicinity of the position A toward the position B if the second areas cause the light rays to converge at the position B, or have values that cause light rays to converge in a direction extending from the vicinity of the position A toward the position C if the second areas cause the light rays to converge at the position C.

### Claim 2 (depends on 1)

The spectacle lens according to claim 1,
wherein the second areas are convex areas, and
in the first area in the peripheral area, both the refractive power error in the meridional direction and the refractive power error in the sagittal direction are −0.25 D or more.

### Claim 3 (depends on 1)

The spectacle lens according to claim 1,
wherein the second areas are convex areas, and
the refractive power error in the meridional direction or the refractive power error in the sagittal direction is −0.12 D or more and +0.12 D or less, and takes a value lower than a value of the other refractive power error.

### Claim 4 (depends on 1)

The spectacle lens of claim 1,
wherein the refractive power error in the meridional direction or the refractive power error in the sagittal direction takes a value obtained by performing ray tracing at a finite distance.

### Claim 5

A method for designing a spectacle lens that includes:
a first area that causes light rays incident on an object-side face of the lens to exit from an eyeball-side face of the lens and to converge at a predetermined position A on a retina of a wearer; and
a plurality of second areas configured to cause light rays to converge at a position B on the object side or a position C on the distal side relative to the position A,
the method including:
setting, in the first area in a peripheral area of the spectacle lens that is a radius range from 4.5 mm to 25 mm of a lens center, a refractive power error in a meridional direction and a refractive power error in a sagittal direction to values that cause light rays to converge in a direction extending from a vicinity of the position A toward the position B if the second areas cause the light rays to converge at the position B, or to values that cause light rays to converge in a direction extending from the vicinity of the position A toward the position C if the second areas cause the light rays to converge at the position C.

### Claim 6 (depends on 5)

The method for designing a spectacle lens according to claim 5,
wherein the second areas are convex areas, and
in the first area in the peripheral area, both the refractive power error in the meridional direction and the refractive power error in the sagittal direction are −0.25 D or more.