# US 10,871,659 B2 · Ophthalmic lens having morphed sinusoidal phase shift structures

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- Number: US 10,871,659 B2
- Document ID: US10871659B2
- Status: Granted
- Kind: B2
- Application number: 16/043,457
- Filed: 2018-07-24
- Published: 2019-01-24
- Granted: 2020-12-22
- Earliest claimed: 2017-07-24
- Assignees: Alcon Inc.
- Applicants: Alcon Inc.
- Inventors: Xin Hong; William Andrew Maxwell; Xin Wei
- Web page: https://patentgrep.com/patent/US10871659B2

## CPC

- G02C 7/028: {Special mathematical design techniques}
- A61F 2/1618: {Multifocal lenses}
- A61F 2/164: {Aspheric lenses}
- G02C 7/022: {Ophthalmic lenses having special refractive features achieved by special materials or material structures (G02C7/049 takes precedence)}
- G02C 7/04: Contact lenses for the eyes (disinfection or sterilisation of contact lenses A61L12/00)
- G02C 7/041: {bifocal; multifocal}
- G02C 7/044: {Annular configuration, e.g. pupil tuned}
- G02C 7/049: {Contact lenses having special fitting or structural features achieved by special materials or material structures}
- A61F 2/1654: {Diffractive lenses}
- 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)
- 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

An ophthalmic lens includes an optic comprising an anterior surface, a posterior surface, and an optical axis. At least one of the anterior surface and the posterior surface has a surface profile including a base curvature and a plurality of morphed sinusoidal phase shift structures. The base curvature may correspond to a base optical power of the ophthalmic lens, and the morphed sinusoidal phase shift structures may be configured to extend depth of focus of the ophthalmic lens at intermediate or near viewing distances.

## Claims

### Claim 1

An ophthalmic lens, comprising
an optic comprising an anterior surface, a posterior surface, and an optical axis, at least one of the anterior surface and the posterior surface having a surface profile including:
a base curvature; and
a morphed sinusoidal phase shift structure modifying the base curvature along a portion of the surface profile, wherein the morphed sinusoidal phase shift structure comprises a plurality of morphed sinusoidal phase shift zones, wherein each of the plurality of morphed sinusoidal phase shift zones comprises a single sinusoidal period;
wherein the morphed sinusoidal phase shift structure is configured to extend depth of focus of the ophthalmic lens as compared to an unmodified portion of the base curvature;
wherein the surface profile is defined as:
Zoptic(r)=Zbase(r)+ZMSPS(r)
wherein Zbase(r) defines the base curvature that is aspheric; and
ZMSPS(r) defines the plurality of morphed sinusoidal phase shift zones;
Z
MSPS
⁡
(
r
)
=
M
i
⁢
T
i
P
π
⁢
(
1
-
cos
⁡
(
r
-
R
i
T
i
P
⁢
π
)
)
,
⁢
R
i
≤
r
<
R
i
+
T
i
P
Z
MSPS
⁡
(
r
)
=
M
i
⁢
T
i
P
π
⁢
(
1
-
cos
⁡
(
r
-
R
i
-
T
i
P
R
i
+
1
-
R
i
-
T
i
P
⁢
π
+
π
)
)
,
⁢
R
i
+
T
i
P
≤
r
<
R
i
+
1
r denotes a radial distance from the optical axis in units of (mm);
Ri and Ri+1 are starting and ending radial positions from the optical axis of each zone in units of (mm);
Mi are step heights of each zone in units of (μm);
TiP are critical points corresponding to a radial distance of a peak of each zone from the starting radial position of the zone; and
i indicates zone numbers i=0, 1, 2, 3 . . . , consecutively from the optical axis.

### Claim 2 (depends on 1)

The ophthalmic lens of claim 1, wherein the base curvature corresponds to a base optical power of the ophthalmic lens.

### Claim 3 (depends on 1)

The ophthalmic lens of claim 1, wherein the morphed sinusoidal phase shift structure is configured to extend depth of focus of the ophthalmic lens to provide intermediate or near viewing distances in the range of 30-55 cm.

### Claim 4 (depends on 1)

The ophthalmic lens of claim 1, wherein the morphed sinusoidal phase shift structure is configured to extend depth of focus of the ophthalmic lens to provide intermediate or near viewing distances in the range of 33-50 cm.

### Claim 5 (depends on 1)

The ophthalmic lens of claim 1, wherein the morphed sinusoidal phase shift structure comprises at least seven morphed sinusoidal phase shift zones.

### Claim 6 (depends on 1)

The ophthalmic lens of claim 1, wherein the ophthalmic lens comprises an intraocular lens.

### Claim 7 (depends on 1)

The ophthalmic lens of claim 1, wherein the ophthalmic lens comprises a contact lens.

### Claim 8 (depends on 1)

The ophthalmic lens of claim 1, wherein:
Z
base
⁡
(
r
)
=
cr
2
1
+
1
-
(
1
+
k
)
⁢
c
2
⁢
r
2
+
a
2
⁢
r
2
+
a
4
⁢
r
4
+
a
6
⁢
r
6
+
a
8
⁢
r
8
+
a
10
⁢
r
10
and:
r denotes a radial distance from the optical axis in units of (mm);
c denotes a base curvature of the surface;
k denotes a conic constant;
a2, a4, a6, a8, and a10 are, respectively, second, fourth, sixth, eighth, and tenth order coefficients.