US 2015/0316790 A1Published application

Progressive Multifocal Ophthalmic Lens

AssigneePegavision Corporation

InventorPai-Hung Chien

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Abstract

A progressive multifocal ophthalmic lens includes at least three high power segments, at least three low power segments, and a plurality of progressive power segments. Shapes of the high power segments and the low power segments are sectors. The high power segments and the low power segments are disposed alternately along an arc direction of the progressive multifocal ophthalmic lens. Shapes of the progressive power segments are sectors. Two sides of each of the progressive power segments along the arc direction respectively connect one of the high power segments and one of the low power segments. The high power segments, the low power segments, and the progressive power segments form a progressive multifocal surface.

Claims9

Dependent claims

A progressive multifocal ophthalmic lens, comprising:

at least three high power segments, at least three low power segments, and a plurality of progressive power segments, shapes of the high power segments and the low power segments are sectors, the high power segments and the low power segments are disposed alternately along an arc direction of the progressive multifocal ophthalmic lens, shapes of the progressive power segments are sectors, two sides of each of the progressive power segments along the arc direction respectively connect one of the high power segments and one of the low power segments, wherein the high power segments, the low power segments, and the progressive power segments form a progressive multifocal surface satisfying the following relationships:
when

[
180

°
·
(
2


s
-
2
)
]
/
p
<
θ
<
[
180

°
·
(
2


s
-
1
)
]
/
p
,

Z
1

(
r
,
θ
)
=
R
-
R
2
-
r
2
+
(
∑
n
=
1
m

a
n
·
r
n
)
·
[
cos

[
π
·
(
p
·
θ
180
)
q
]
-
1
]
;
and
when

[
180

°
·
(
2


s
-
1
)
]
/
p
<
θ
<
(
180

°
·
2


s
)
/
p
,

Z
2

(
r
,
θ
)
=
R
-
R
2
-
r
2
+
(
∑
n
=
1
m

a
n
·
r
n
)
·
[
cos

[
π
·
(
2
-
p
·
θ
180
)
q
]
-
1
]
,
wherein r is a radial coordinate of the progressive multifocal surface, 0≦r≦r0, r0 is a radius of an optical segment of the progressive multifocal surface, θ is an angular coordinate of the progressive multifocal surface, 0°≦θ≦360°, Z1 and Z2 are height coordinates of the progressive multifocal surface from a reference plane, R is a radius of curvature of the progressive multifocal surface, p is a number of the high power segments or a number of the low power segments, wherein p is an integer greater than or equal to 3, q is a real number greater than or equal to 1, m and n are positive integers, an is a real number, and s is an integer and 1≦s≦p.

174 more elements

A progressive multifocal ophthalmic lens, comprising:

at least three high power segments, at least three low power segments, and a plurality of progressive power segments, shapes of the high power segments and the low power segments are sectors, the high power segments and the low power segments are disposed alternately along an arc direction of the progressive multifocal ophthalmic lens, shapes of the progressive power segments are sectors, two sides of each of the progressive power segments along the arc direction respectively connect one of the high power segments and one of the low power segments, wherein the high power segments, the low power segments, and the progressive power segments form a progressive multifocal surface satisfying the following relationships:
when

[
180

°
·
(
2


s
-
2
)
]
/
p
<
θ
<
[
180

°
·
(
2


s
-
1
)
]
/
p
,

Z
1

(
r
,
θ
)
=
R
-
R
2
-
r
2
-
(
∑
n
=
1
m

a
n
·
r
n
)
·
[
cos

[
π
·
(
1
-
p
·
θ
180
)
q
]
+
1
]
;
and
when

[
180

°
·
(
2


s
-
1
)
]
/
p
<
θ
<
(
180

°
·
2


s
)
/
p
,

Z
2

(
r
,
θ
)
=
R
-
R
2
-
r
2
-
(
∑
n
=
1
m

a
n
·
r
n
)
·
[
cos

[
π
·
(
p
·
θ
180
-
1
)
q
]
+
1
]
,
wherein r is a radial coordinate of the progressive multifocal surface, 0≦r≦r0, r0 is a radius of an optical segment of the progressive multifocal surface, θ is an angular coordinate of the progressive multifocal surface, 0°≦θ≦360°, Z1 and Z2 are height coordinates of the progressive multifocal surface from a reference plane, R is a radius of curvature of the progressive multifocal surface, p is a number of the high power segments or a number of the low power segments, wherein p is an integer greater than or equal to 3, q is a real number greater than or equal to 1, m and n are positive integers, an is a real number, and s is an integer and 1≦s≦p.

176 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/452,831Filed 6 Aug 2014
Priority: TW 10320754330 Apr 2014
Published: 5 Nov 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G02C 7/063
Spectacle lenses with progressively varying focal power: shape of the progressive surface
A61F 2/1618
Pseudo-accommodative, e.g. multifocal or enabling monovision: multifocal lenses
G02C 7/042
Bifocal; multifocal: simultaneous type
G02C 7/045
Bifocal; multifocal: sectorial configuration

Family

US 9,395,560 B2Related patent
US 2015/0316790 A1This patent

From the US filing history. Foreign family members aren’t listed.

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