Multizonal lens with extended depth of focus

• US 8,974,526 B2
• Filed: 03/05/2009
• Issued: 03/10/2015
• Est. Priority Date: 08/27/2007
• Status: Active Grant

• Current Assignee: Amo Groningen B.V (Johnson & Johnson)
• Original Assignee: Amo Groningen B.V (Johnson & Johnson)
• Inventors: Bogaert, Theophilus
• Primary Examiner(s): PREBILIC, PAUL B
• Application Number:
  US12/398,933
• Publication Number:
  US 20100057202A1
• Time in Patent Office: 2,196 Days
• Field of Search: 623/6.27, 623/6.28, 623/6.3, 623/6.31, 623/6.32, 623/6.34
• US Class Current: 623/6.27
• 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.

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 sized such that under bright or intermediate lighting conditions most of the light passing through the pupil and entering the IOL passes through the central zone and wherein the central zone has an optical power that progressively and continuously increases from a first paraxial optical power at the optical axis selected to provide hyperfocal vision when the intraocular lens is disposed within an eye to a second optical power at the outer diameter that is greater than the first paraxial optical power, wherein the difference in the optical power between the first paraxial optical power and the second optical power is less than or equal to about 1.5 diopters and the second optical power 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, the outer zone characterized by a third optical power at the inner diameter which is less than the first paraxial optical power and selected to provide distance vision when the intraocular lens is disposed within the eye, wherein the outer zone further comprises a negative spherical aberration,

wherein the central zone and the outer zone are the only two zones in the optic and entirely fill the clear aperture of the optic, wherein the variation in optical power over the entire clear aperture is less than or equal to 2.0 diopters,

and wherein the central and outer zones are configured such that more light for distant vision under low lighting conditions is focused by the outer zone onto the surface of the retina.

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 variation in optical power over the clear aperture is less than or equal to about 0.5 Diopter plus the variation in optical power produced 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.

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

7. 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.

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