Intraocular lens that improves overall vision where there is a local loss of retinal function

Patent metadata

Field	Value
Publication number	US-12478465-B2
Application number	US-202218064235-A
Country	US
Kind code	B2
Filing date	Dec 9, 2022
Priority date	Mar 10, 2014
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

Systems and methods are provided for improving overall vision in patients suffering from a loss of vision in a portion of the retina (e.g., loss of central vision) by providing symmetric or asymmetric optic with aspheric surface which redirects and/or focuses light incident on the eye at oblique angles onto a peripheral retinal location. The intraocular lens can include a redirection element (e.g., a prism, a diffractive element, or an optical component with a decentered GRIN profile) configured to direct incident light along a deflected optical axis and to focus an image at a location on the peripheral retina. Optical properties of the intraocular lens can be configured to improve or reduce peripheral errors at the location on the peripheral retina. One or more surfaces of the intraocular lens can be a toric surface, a higher order aspheric surface, an aspheric Zernike surface or a Biconic Zernike surface to reduce optical errors in an image produced at a peripheral retinal location by light incident at oblique angles.

First claim

What is claimed is:

1 . An intraocular lens configured to improve vision in a patient's eye where there is a loss of retinal function, the intraocular lens comprising:
a redirection element configured to redirect incident light along a deflected optical axis which intersects a retina of a user at a preferred retinal locus, the redirection element comprising a surface with a slope profile that is tailored such that, in use, the intraocular lens:
redirects incident light along the deflected optical axis;
focuses the incident light at the preferred retinal locus; and
reduces optical wavefront errors arising from the redirecting of the incident light along the deflected optical axis,
wherein the redirection element comprises a plurality of zones, each zone having a different, constant slope profile, wherein each respective, different slope profile of the plurality of zones is configured to redirect and focus the incoming rays on the preferred retinal locus, wherein a posterior surface and/or an anterior surface of the intraocular lens are aspheric, wherein the posterior surface and/or the anterior surface are configured to reduce astigmatism in the focused image produced at the preferred retinal locus, and wherein the deflected optical axis is a first optical axis, and the intraocular lens directs incident light along a second optical axis for intersecting the fovea of the patient, the first optical axis being deflected relative to the second optical axis, and the intraocular lens produces a first optical power along the first optical axis and a second optical power along the second optical axis, the first optical power being different than the second optical power.

2 . The intraocular lens of claim 1 , wherein the slope profile is based at least in part on a distance from an IOL vertex to an original focus, an index of refraction of the IOL, an index of refraction of an aqueous environment, an angle inside the eye to the preferred retinal locus relative to a back vertex of the IOL, and/or a posterior radius of curvature of the IOL.

3 . The intraocular lens of claim 1 , wherein a thickness of the redirection element is less than or equal to 0.5 mm.

4 . The intraocular lens of claim 1 , wherein the slope profile is tailored based at least in part on an analytical solution to an equation describing an eye of a patient.

5 . The intraocular lens of claim 1 , wherein the slope profile is tailored based at least in part on simulations performed using ray tracing techniques.

6 . The intraocular lens of claim 1 , wherein the slope profile is determined analytically using an equation that incorporates an axial length to the preferred retinal locus, an angle of the deflected optical axis relative to an undeflected optical axis, and a radial position of the preferred retinal locus.

7 . The intraocular lens of claim 6 , wherein a curvature of the posterior surface of the intraocular lens is configured to provide a focused image at the fovea of the retina of the patient.

8 . The intraocular lens of claim 1 , wherein the slope profile is tailored using an iterative procedure that adjusts a portion of the slope profile to account for a thickness of the redirection element.

9 . The intraocular lens of claim 1 , wherein the redirection element is a separate, additional surface on the intraocular lens.

10 . The intraocular lens of claim 1 , wherein the redirection element is a ring structure.

11 . The intraocular lens of claim 1 , wherein the redirection element covers a central portion of the intraocular lens.

12 . The intraocular lens of claim 11 , wherein the central portion has a diameter that is greater than or equal to 1.5 mm and less than or equal to 4.5 mm.

13 . The intraocular lens of claim 1 , wherein the posterior surface of the intraocular lens includes the redirection element, and the anterior surface of the intraocular lens includes a second redirection element comprising a plurality of zones, each zone having a slope.

14 . The intraocular lens of claim 1 , wherein a portion of the IOL includes the redirection element and another portion of the IOL is devoid of the redirection element.

15 . The intraocular lens of claim 14 , wherein the portion of the IOL that includes the redirection element has a different optical power from the portion of the IOL that is devoid of the redirection element.

16 . The intraocular lens of claim 1 , wherein the first optical power is greater than the second optical power.

17 . The intraocular lens of claim 1 , wherein the intraocular lens produces a magnification along the first optical axis that is greater than a magnification along the second optical axis.

Assignees

• Amo Groningen Bv

Inventors

• Rosen Robert
• Weeber Hendrik A
• Canovas Vidal Carmen
• Van Der Mooren Marrie
• Sellitri Dora

Classifications

• A61F2/1659

  having variable absorption coefficient for electromagnetic radiation, e.g. photochromic lenses · CPC title

• A61B3/107

  for determining the shape or measuring the curvature of the cornea · CPC title

• A61B3/103

  for determining refraction, e.g. refractometers, skiascopes · CPC title

• A61B3/1005

  for measuring distances inside the eye, e.g. thickness of the cornea (A61B3/11 takes precedence) · CPC title

• A61B3/0025

  characterised by electronic signal processing, e.g. eye models · CPC title