Lens element
A lens element intended to be worn in front of an eye of a person including a refraction area having a first refractive power based on a prescription for correcting an abnormal refraction of said eye of the person and a second refractive power different from the first refractive power, and a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye so as to slow down the progression of the abnormal refraction of the eye.
1. A lens element wearable in front of an eye, comprising:
a refraction area having a refractive power based on a prescription corresponding to the eye; and
at least two non-contiguous optical elements, at least one optical element having an optical function of not focusing an image on a retina of the eye to slow down a progression of an abnormal refraction of the eye,
wherein the at least two non-contiguous optical elements are configured such that a curvature of the at least two non-contiguous optical elements is different from a curvature of the refraction area,
wherein a mean sphere of the at least two non-contiguous optical elements is different from the mean sphere of the refraction area, where the mean sphere is defined as
SPH
mean
=
1
2
(
SPH
m
i
n
+
SPH
m
a
x
)
,
where
SPH
m
i
n
=
(
n
-
1
)
*
CURV
m
i
n
=
n
-
1
R
m
a
x
,
and
SPH
max
=
(
n
-
1
)
*
CURV
max
=
n
-
1
R
min
.
2. The lens element according to claim 1 , wherein the refraction area is formed at least closer to an optical center of the lens element than the at least two non-contiguous optical elements.
3. The lens element according to claim 1 , wherein the refraction area is formed closer to and further from an optical center of the lens element than the at least two non-contiguous optical elements.
4. The lens element according to claim 1 , wherein the refraction area surrounds each of the at least two non-contiguous optical elements.
5. The lens element according to claim 1 , wherein a difference between a first refractive power of the refraction area and a second refractive power of the at least two non-contiguous optical elements is greater than or equal to 0.5 D.
6. The lens element according to claim 1 , wherein the at least two non-contiguous optical elements are included in a plurality of rings of non-continuous optical elements.
7. The lens element according to claim 1 , wherein at least one of the at least two non-contiguous optical elements has a non-spherical optical function.
8. The lens element according to claim 1 , wherein at least one of the at least two non-contiguous optical elements has an optical function of focusing an image on a position other than the retina.
9. The lens element according to claim 1 , wherein the at least one of the at least two non-contiguous optical elements has an optical function of generating a caustic blur without focusing an image.
10. The lens element according to claim 1 , wherein the at least two non-contiguous optical elements are arranged in a non-spherical position on a base portion of the lens element.
11. The lens element according to claim 1 , wherein the refraction area is included in a base portion of the lens element.
12. A method comprising:
applying a mold surface to form a front surface of a lens element, the mold surface being formed by incorporating areas corresponding to microlenses into the mold surface; and
molding the lens element using a mold process producing a lens element having microlenses incorporated therein,
wherein a mean sphere of the microlenses is defined as
SPH
mean
=
1
2
(
SPH
m
i
n
+
SPH
m
a
x
)
,
where
SPH
m
i
n
=
(
n
-
1
)
*
CURV
m
i
n
=
n
-
1
R
m
a
x
,
and
SPH
max
=
(
n
-
1
)
*
CURV
max
=
n
-
1
R
min
.
13. A lens element wearable in front of an eye, comprising:
a base lens element including a refraction area having a refractive power based on a prescription corresponding to the eye; and
at least two non-contiguous optical elements formed on the base lens element, at least one optical element having an optical function of not focusing an image on a retina of the eye to slow down a progression of an abnormal refraction of the eye,
wherein the at least two non-contiguous optical elements are configured such that a curvature of the at least two non-contiguous optical elements is different from a curvature of the base lens element, and
wherein the at least two non-contiguous optical elements are arranged in a non-circular position on a base portion of the lens element.
14. The lens element according to claim 13 , wherein a mean sphere of the at least two non-contiguous optical elements is different from the mean sphere of the refraction area, where the mean sphere is defined as
SPH
mean
=
1
2
(
SPH
m
i
n
+
SPH
m
a
x
)
,
where
SPH
m
i
n
=
(
n
-
1
)
*
CURV
m
i
n
=
n
-
1
R
m
a
x
,
and
SPH
max
=
(
n
-
1
)
*
CURV
max
=
n
-
1
R
min
.
15. The lens element according to claim 13 , wherein the refraction area is formed at least closer to an optical center of the lens element than the at least two non-contiguous optical elements.
16. The lens element according to claim 13 , wherein the refraction area is formed closer to and further from an optical center of the lens element than the at least two non-contiguous optical elements.
17. The lens element according to claim 13 , wherein the refraction area surrounds each of the at least two non-contiguous optical elements.
18. The lens element according to claim 13 , wherein a difference between a first refractive power of the refraction area and a second refractive power of the at least two non-contiguous optical elements is greater than or equal to 0.5 D.