MULTIZONAL LENS WITH EXTENDED DEPTH OF FOCUS

• US 20100057202A1
• Filed: 03/05/2009
• Published: 03/04/2010
• Est. Priority Date: 08/27/2007
• Status: Active Grant

• Current Assignee: Amo Groningen B.V (Johnson & Johnson)
• Original Assignee: Abbott Medical Optics Incorporated (Johnson & Johnson)
• Inventors: Bogaert, Theophilus
• Granted Patent: US 8,974,526 B2
• Time in Patent Office: Days
• US Class Current: 623/6.270
• CPC Class Codes: A61F 2/14 Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
• CPC Class Codes: A61F 2/1602 Corrective lenses for use in addition to the natural lenses of the eyes or for pseudo-phakic eyes
• CPC Class Codes: A61F 2/1613 having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus
• CPC Class Codes: A61F 2/1618 Multifocal lenses
• CPC Class Codes: A61F 2/1637 Correcting aberrations caused by inhomogeneities; correcting intrinsic aberrations, e.g. of the cornea, of the surface of the natural lens, aspheric, cylindrical, toric lenses
• CPC Class Codes: G02C 2202/02 Mislocation tolerant lenses or lens systems
• CPC Class Codes: G02C 7/04 Contact lenses for the eyes disinfection or sterilisation of contact lenses A61L12/00
• CPC Class Codes: G02C 7/041 bifocal; multifocal

Abstract

An intraocular lens for providing enhanced vision includes an optic having a clear aperture having an outer diameter. The optic has opposing first and second surfaces disposed about an optical axis, the first surface including a cross-sectional profile. The optic further includes central and outer zones that fill the entire clear aperture of the optic. The central zone is disposed about the optical axis having an outer diameter, the profile in the vicinity of the central zone having a constant radius of curvature or a radius of curvature that increases with increasing radius from the optical axis. The outer zone is disposed about the central zone, the profile in the outer zone having a base curvature with a base radius of curvature and a center of curvature, the profile in the outer zone characterized in that, as the distance from the optical axis increases, the distance from the center of curvature of the base curvature also increases. The central zone and the outer zone.

Claims

1. An intraocular lens, comprising:

an optic having a clear aperture having an outer diameter, the optic comprising;

a first surface and an opposing second surface, the surfaces being disposed about an optical axis, the first surface having a first radius of curvature at the optical axis and the second surface having a second radius of curvature at the optical axis;

a central zone disposed about the optical axis having an outer diameter and an optical power that progressively varies from a first paraxial optical power at the optical axis to a second optical power at the outer diameter that is greater than the first paraxial optical power and is greater than or equal to the optical power of a reference spherical lens at a diameter equal to the outer diameter of the central zone, the reference spherical lens having a paraxial optical power equal to the first paraxial optical power, a first surface radius of curvature equal to the first radius of curvature at the optical axis, and a second surface radius of curvature equal to the second radius of curvature at the optical axis; and

an outer zone disposed about the central zone, the outer zone comprising an inner diameter and an outer diameter equal to the outer diameter of the clear aperture and configured to reduce a positive spherical aberration of a cornea of an eye, the outer zone characterized by a third optical power at the inner diameter and a negative spherical aberration, the outer zone having an outer diameter that is equal to the outer diameter of the clear aperture;

the central zone and the outer zone entirely filling the clear aperture of the optic.

2. The intraocular lens of claim 1, wherein the difference between the third optical power and the first optical power is about 0.4 Diopter.

3. The intraocular lens of claim 1, wherein the absolute value of the difference between the first optical power and the second optical power is about one Diopter.

4. The intraocular lens of claim 1, wherein the optic has a variation in optical power over the clear aperture that is less than about 1.5 Diopters.

5. The intraocular lens of claim 1, wherein the plurality of optical powers progressively and continuously increase from the first optical power to the second optical power.

6. The intraocular lens of claim 1, wherein the plurality of optical powers progressively and continuously increase from the second optical power to the first optical power.

7. The intraocular lens of claim 1, wherein the variation in optical power over the clear aperture is less than or equal to about 0.5 Diopter plus the variation in optical power produces by the spherical aberrations of a spherical optic having a nominal optical power that is equal to the third optical power of the outer zone.

8. The intraocular lens of claim 1, wherein negative spherical aberration is selected to at least partially compensate for a spherical aberration of a cornea of the eye.

9. The intraocular lens of claim 1, wherein the first and second surfaces in the vicinity of the central zone comprises spherical surfaces.

10. The intraocular lens of claim 1, wherein the central zone has a diameter that is between about 1 millimeter and about 3 millimeters.

11. The intraocular lens of claim 1, wherein the first zone and the second zone have at least one surface with a cross-sectional profile described by a polynomial and/or spline.

12. The intraocular lens of claim 1, wherein the zones are configured to provide more light to the retina of the eye for distant vision when light enters the entire central and outer zones.

13. The intraocular lens of claim 1, wherein the first optical power is selected based on the structure of the eye and/or based on a request from a patient.

14. The intraocular lens of claim 1, wherein the negative spherical aberration is selected to at least partially compensate for a spherical aberration of the cornea of the eye.

15. The intraocular lens of claim 1, wherein the negative spherical aberration is selected based on an average ocular aberration of the eyes of a selected population.

16. The intraocular lens of claim 15, wherein the population includes people of a specific age group, people with a cataract, people who have received a corneal ablative procedure, people who are candidates for a corneal ablative procedure, and/or people who are highly myopic or highly hyperopic.

17. The intraocular lens of claim 1, wherein the outer zone has an optical power that is about 20 Diopters and a spherical aberration that is between about −

0.19 and about −

0.202 microns.

18. The intraocular lens of claim 1, wherein the outer zone has an optical power that is about 20 Diopters and a spherical aberration that is about −

0.156 microns.

19. The intraocular lens of claim 1, wherein at least one of the first optical power and the second optical power is equal to the third optical power.

20. The intraocular lens of claim 1, wherein the third optical power is selected to provide distant vision when the intraocular lens is disposed within the eye, and the first optical power and the second optical power are selected so that the central zone provides a visual acuity of at least 20/30, based on the standard Snellen test for visual acuity, for objects located at a hyperfocal distance from the eye.

21. The intraocular lens of claim 1, wherein at least one of the zones has a cylinder power.

22. An intraocular lens, comprising:

an optic having a clear aperture having an outer diameter, the optic comprising;

a first surface and an opposing second surface, the surfaces being disposed about an optical axis, the first surface having a first radius of curvature at the optical axis and the second surface having a second radius of curvature at the optical axis;

a central zone disposed about the optical axis having an outer diameter and an optical power that progressively varies from a first paraxial optical power at the optical axis to a second optical power at the outer diameter that is greater than the first paraxial optical power and is greater than or equal to the optical power of a reference spherical lens at a diameter equal to the outer diameter of the central zone, the reference spherical lens having a paraxial optical power equal to the first paraxial optical power, a first surface radius of curvature equal to the first radius of curvature at the optical axis, and a second surface radius of curvature equal to the second radius of curvature at the optical axis;

an outer zone disposed about the central zone, the outer zone comprising an inner diameter and an outer diameter equal to the outer diameter of the clear aperture and configured to reduce a positive spherical aberration of a cornea of an eye, the outer zone characterized by a third optical power at the inner diameter and a negative spherical aberration, the outer zone having an outer diameter that is equal to the outer diameter of the clear aperture; and

an transition zone disposed between the central zone and the outer zone, the transition zone having a radial extent that is less that a radial extent of the central zone and less than the radial extent of the outer zone, the power of the intermediate zone monotonically increasing or monotonically decreasing between the second optical power of the central zone and the third diameter of the outer zone;

the central zone, the transition zone, and the outer zone entirely filling the clear aperture of the optic.

23. An intraocular lens, comprising:

an optic having a clear aperture having an outer diameter, the optic comprising;

a first surface and an opposing second surface, the surfaces being disposed about an optical axis, the first surface having a first radius of curvature at the optical axis and the second surface having a second radius of curvature at the optical axis, the first surface having a cross-sectional profile along a plane that is parallel to, and passes through, the optical axis;

a central zone disposed about the optical axis having an outer diameter, the profile in the vicinity of the central zone having a constant radius of curvature or a radius of curvature that increases with increasing radius from the optical axis;

an outer zone disposed about the central zone having an inner diameter and an outer diameter equal to the outer diameter of the clear aperture, the profile in the vicinity of the outer zone having a base curvature with a base radius of curvature and a center of curvature, the profile in the vicinity of the outer zone being characterized in that, as the distance from the optical axis increases, the distance from the center of curvature of the base curvature monotonically increases, the profile in the vicinity of the outer zone being configured to have a negative spherical aberration;

the central zone and the outer zone entirely filling the clear aperture of the optic.