# US 10,371,964 B2 · Contact lens product

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- Number: US 10,371,964 B2
- Document ID: US10371964B2
- Status: Granted
- Kind: B2
- Application number: 15/255,319
- Filed: 2016-09-02
- Published: 2017-03-16
- Granted: 2019-08-06
- Earliest claimed: 2015-09-15
- Assignees: Largan Medical Co., Ltd.
- Applicants: Largan Medical Co., Ltd.
- Inventors: En-Ping Lin; Wei-Yuan Chen; Chun-Hung Teng
- Web page: https://patentgrep.com/patent/US10371964B2

## CPC

- G02C 7/041: {bifocal; multifocal}
- 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

A contact lens product includes a multifocal contact lens and a buffer solution. The multifocal contact lens is immersed in the buffer solution. The multifocal contact lens includes a central region and at least one annular region. The annular region concentrically surrounds the central region, and a diopter of the annular region is different from a diopter of the central region. The multifocal contact lens is made of silicone hydrogel or hydrogel. The annular region closest to a periphery of the multifocal contact lens is a first annular region.

## Claims

### Claim 1

A contact lens product, comprising:
a multifocal contact lens, comprising:
a central region; and
at least one annular region concentrically surrounding the central region, wherein a diopter of the annular region is different from a diopter of the central region; and
wherein the multifocal contact lens is made of silicone hydrogel or hydrogel; and
a buffer solution, wherein the multifocal contact lens is immersed in the buffer solution;
wherein the annular region closest to a periphery of the multifocal contact lens is a first annular region, the diopter of the central region of the multifocal contact lens is PowC, a maximal diopter of the first annular region of the multifocal contact lens is PowP1, each of the annular regions comprises an absolute value of a slope, a maximum of all the absolute values of the slopes is SloPMax, a diameter of the central region of the multifocal contact lens is DiC, and the following conditions are satisfied:
3 D<PowP1−PowC;
2.4≤SloP Max; and
1 mm≤DiC.

### Claim 2 (depends on 1)

The contact lens product of claim 1, wherein the multifocal contact lens comprises at least two annular regions, each of the annular regions comprises a maximal diopter, a maximum of all the maximal diopters is PowPMax, and the following condition is satisfied:
0 D≤PowPMax≤20 D.

### Claim 3 (depends on 1)

The contact lens product of claim 1, wherein the multifocal contact lens comprises at least two annular regions, each of the annular regions comprises a maximal diopter, a minimum of all the maximal diopters is PowPMin, and the following condition is satisfied:
−8 D≤PowP Min≤15 D.

### Claim 4 (depends on 1)

The contact lens product of claim 1, wherein the multifocal contact lens comprises at least two annular regions, each of the annular regions comprises a maximal diopter, a maximum of all the maximal diopters is PowPMax, a minimum of all the maximal diopters is PowPMin, and the following condition is satisfied:
−8.0≤PowP Min/PowP Max≤1.0.

### Claim 5 (depends on 1)

The contact lens product of claim 1, wherein the multifocal contact lens comprises at least two annular regions, each of the annular regions comprises a maximal diopter, a maximum of all the maximal diopters is PowPMax, the diopter of the central region of the multifocal contact lens is PowC, and the following condition is satisfied:
0.10≤|PowP Max−PowC|/PowP Max≤10.

### Claim 6 (depends on 1)

The contact lens product of claim 1, wherein the multifocal contact lens comprises at least two annular regions, each of the annular regions comprises an absolute value of a slope, a minimum of all the absolute values of the slopes is SloPMin, and the following condition is satisfied:
0≤SloPMin≤10.

### Claim 7 (depends on 1)

The contact lens product of claim 1, wherein the multifocal contact lens comprises at least two annular regions, each of the annular regions comprises the absolute value of a slope, the maximum of all the absolute values of the slopes is SloPMax, a minimum of all the absolute values of the slopes is SloPMin, and the following condition is satisfied:
0≤SloPMin/SloPMax≤1.0.

### Claim 8 (depends on 1)

The contact lens product of claim 1, wherein a slope of the annular region of the multifocal contact lens is SloP, and the following condition is satisfied:
0≤|SloP|≤20.

### Claim 9 (depends on 1)

The contact lens product of claim 1, wherein a slope of the central region of the multifocal contact lens is SloC, and the following condition is satisfied:
0≤|SloC|≤0.10.

### Claim 10 (depends on 1)

The contact lens product of claim 1, wherein the diameter of the central region of the multifocal contact lens is DiC, an outer diameter of the first annular region of the multifocal contact lens is DiP1, and the following condition is satisfied:
0.15≤DiC/DiP1<1.

### Claim 11 (depends on 1)

The contact lens product of claim 1, wherein a composition for manufacturing the silicone hydrogel comprises 2-hydroxyethyl methacrylate, 3-methacryloyloxypropyltris(trimethyl silyloxy)silane, 2-hydroxy-2-methyl-propiophenone, N-vinyl-2-pyrrolidinone, N,N-dimethyl acrylamide, polysiloxane macromer, 4-(phenyldiazenyl) phenyl methacrylate, methyl methacrylate and ethanol.

### Claim 12 (depends on 1)

The contact lens product of claim 1, wherein a composition for manufacturing the hydrogel comprises 2-hydroxyethyl methacrylate, 4-(phenyldiazenyl) phenyl methacrylate, ethylene glycol dimethacrylate, 2-hydroxy-2-methyl-propiophenone, glycerol, 1,1,1-trimethylol propane trimethacrylate and methacrylic acid.

### Claim 13 (depends on 1)

The contact lens product of claim 1, wherein a composition for manufacturing the hydrogel comprises 2-hydroxyethyl methacrylate, 4-(phenyldiazenyl) phenyl methacrylate, ethylene glycol dimethacrylate, 2-hydroxy-2-methyl-propiophenone, glycerol, 1,1,1-trimethylol propane trimethacrylate and glycerol monomethacrylate.

### Claim 14 (depends on 1)

The contact lens product of claim 1, wherein a composition for manufacturing the hydrogel comprises 2-hydroxyethyl methacrylate, 4-(phenyldiazenyl) phenyl methacrylate, ethylene glycol dimethacrylate, 2-hydroxy-2-methyl-propiophenone, glycerol and N-vinyl-2-pyrrolidinone.