US 12,714,553 B2Granted

Intraocular lens with focal performance tailored to pupil size deploying refractive power modification along spiral tracks

AssigneeRayner Intraocular Lenses Limited

InventorsJoao Marcelo De Almeida Gusmao Lyra, Rodrigo De Abreu, Diogo Ferraz Costa

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Abstract

A new family of intraocular lenses that exhibit an extended depth of focus or a tailored multifocality where the lenses are designed by the combination of a base lens topology and additional refractive power range described along a spiral-like grid. The variety of parameters confer a great versatility to the lens design, which allows the achievement of the best suitable features to attend to a wide range of visual demands in performing different activities. It is possible to set the parameters to specify apt-focal lenses that account for optical performance changes due to pupil aperture variations, as well as to counter positive dysphotopic effects.

Claims13

Dependent claims

An intraocular lens comprising:

a transparent body with an anterior surface and a posterior surface having an optical axis intersecting centers of the anterior and the posterior surfaces;
a base refractive power (ΦIOL) range defined by base topologies of the anterior and posterior surfaces combined, as defined by an equation
Φ
IOL
=
(
n
IOL
-
n
a
⁢
q
)
R
a
⁢
n
⁢
t
+
(
n
v
⁢
i
⁢
t
-
n
IOL
)
R
p
⁢
o
⁢
s
-
[
(
n
IOL
-
n
a
⁢
q
)
R
a
⁢
n
⁢
t
.
(
n
v
⁢
i
⁢
t
-
n
IOL
)
R
p
⁢
o
⁢
s
.
t
IOL
n
IOL
]
;
wherein nIOL is a refraction index of the intraocular lens, nag is a refraction index of an aqueous humor, nvit is a refraction index of a vitreous humor, Rant is a radius of curvature of the anterior surface, Rpos is a radius of curvature of the posterior surface and tIOL is a central thickness of the intraocular lens;
and
spiral tracks on at least one surface of said anterior and posterior surfaces to provide an additional power distribution along said spiral tracks,
wherein said spiral tracks originate from a center or an outer edge of a central zone of said surface, extend towards a periphery of the lens, and end at said periphery or at some point within said surface, wherein said surface has a spiral grid formed by said surface in a zone of one of said spiral tracks being shifted axially with respect to said surface in a zone of an adjacent one of said spiral tracks in a step-like helicoidal pattern following internal and external edges of the spiral tracks, the zones thereby forming shifted zones,
wherein in said step-like helicoidal pattern a transition region is introduced between the shifted zones, and
wherein said transition region occupies part of at least one of the spiral tracks to which it transitions in a radial direction, or occupies a full width of said spiral track.

83 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/779,779Filed 2 Mar 2021
Published: US 2023/0338137 A126 Oct 2023
Granted: 25 Aug 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

A61F 2/1618
Pseudo-accommodative, e.g. multifocal or enabling monovision: multifocal lenses
A61F 2/1616
Having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having…:…
A61F 2/1645
Correcting aberrations caused by inhomogeneities; correcting intrinsic aberrations, e.g. of the cornea, of the surface of the natural lens,…:…
A61F 2002/1681
Intraocular lenses: having supporting structure for lens, e.g. haptics