Intraocular lens

• US 20060244904A1
• Filed: 04/04/2006
• Published: 11/02/2006
• Est. Priority Date: 04/05/2005
• Status: Active Grant

• Current Assignee: Alcon Incorporated
• Original Assignee: Alcon Incorporated
• Inventors: Simpson, Michael J., Zhang, Xiaoxiao, Karakelle, Mutlu, Xie, Jihong, Van Noy, Stephen J., Hong, Xin, Stanley, Dan
• Granted Patent: US 7,350,916 B2
• Time in Patent Office: Days
• US Class Current: 351/160.R
• 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 2/1637 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 7/02 Lenses; Lens systems ; Methods of designing lenses

Abstract

In one aspect, the present invention provide an ophthalmic lens (e.g., an IOL) that includes an optic having an anterior optical surface and a posterior optical surface, where the optic provides an optical power in a range of about 16 D to about 25 D as measured in a medium having an index of refraction substantially similar to that of the eye'"'"'s aqueous humor (e.g., about 1.336). At least one of the optical surfaces is characterized by an aspherical base profile such that the optic exhibits a negative spherical aberration in a range of about −0.202 microns to about −0.190 microns across the power range.

Claims

1. An ophthalmic lens, comprising

an optic having an anterior surface and a posterior surface, said optic providing an optical power in a range of about 16 D to about 25 D,

wherein at least one of said surfaces is characterized by an aspherical base profile such that said optic exhibits a negative spherical aberration in a range of about −

0.202 microns to about −

0.190 microns across said power range.

2. The ophthalmic lens of claim 1, wherein said aspherical base profile is characterized by a conic constant in a range of about −

73 to about −

27.

3. The ophthalmic lens of claim 1, wherein said aspherical base profile is defined by the following relation:

4. The ophthalmic lens of claim 1, wherein said optic exhibits a shape factor in a range of about −

0.016 to about 0.071.

5. The ophthalmic lens of claim 1, wherein said optic comprises a biocompatible polymeric material.

6. The ophthalmic lens of claim 5, wherein the polymeric material is selected from the group consisting of acrylic, silicone and hydrogel materials.

7. The ophthalmic lens of claim 1, wherein said ophthalmic lens comprises an IOL.

16. The ophthalmic lens of claim 11, wherein said lens comprises an IOL.

8. An ophthalmic lens, comprising

an optic having an anterior surface and a posterior surface, said optic providing an optical power in a range of about 16 D to about 25 D, said optic having a principal plane exhibiting an offset change in a range of about −

0.019 mm to about +0.018 mm from a selected plane of said optic,

wherein at least one of said surfaces is characterized by an aspherical base profile such that the optic exhibits a negative spherical aberration in a range of about −

0.202 microns to about −

0.190 microns across said power range

9. The ophthalmic lens of claim 8, wherein said optic comprises a plurality of haptics coupled thereto, and said selected plane comprises a plane defined by junctions of said haptics and said optic.

10. The ophthalmic lens of claim 8, wherein said ophthalmic lens comprises an IOL.

11. An ophthalmic lens, comprising

an optic having an anterior surface and a posterior surface, said optic providing a nominal optical power in a range of about 16 D to about 25 D,

wherein at least one of said surfaces exhibits an aspheric base profile to provide a negative spherical aberration for countering, upon implantation in the eye, a positive spherical aberration of the cornea such that an optical system comprising the lens and cornea exhibits a residual positive spherical aberration less than about +0.14 microns.

12. The ophthalmic lens of claim 11, wherein said residual spherical aberration lies in a range of about +0.006 to about +0.09 microns.

13. The ophthalmic lens of claim 11, wherein said aspheric base profile is characterized by a conic constant in a range of about −

73 to about −

27.

14. The ophthalmic lens of claim 11, wherein said optic exhibits a shape factor in a range of about −

0.016 to about 0.071.

15. The ophthalmic lens of claim 11, wherein said optic comprises a soft acrylic polymeric material.

18. The ophthalmic lens of claim 14, wherein said lens comprises an IOL.

17. An ophthalmic lens, comprising

an optic having a refractive anterior surface and a refractive posterior surface,

said surfaces cooperatively providing an optical power in a range of about 16 D to about 25 D,

wherein a profile of at least one of said surfaces is characterized in accordance with the following relation:

$z=\frac{{\mathrm{cr}}^2}{1+{\left[1-\left(1+k\right)<br><br>c^2<br><br>r^2\right]}^{\frac{1}{2}}}+a_1<br><br>r^2+a_2<br><br>r^4+a_3<br><br>r^6$

wherein,

z denotes a sag of the surface at a radial distance r from an optical axis of the lens,

c denotes curvature of the surface at its apex (at the intersection of the optical axis with the surface)

k denotes a conic constant,

a₁ denotes a second order aspheric coefficient,

a₂ denotes a fourth order aspheric coefficient, and

a₃ denotes a sixth order aspheric coefficient,

wherein c ranges from about 0.0369 ( 1/27.1) mm<sup>−

1</sup> to about 0.0541 ( 1/18.5) mm<sup>−

1</sup>, k ranges from about −

73 to about −

27, a₁ ranges from about −

0.000209 mm<sup>−

1</sup> to about −

0.000264 mm<sup>−

1</sup>, a₂ ranges from about −

0.0000297 mm<sup>−

3</sup> to about −

0.0000131 mm<sup>−

3</sup>, and a₃ ranges from about 0.00000978 mm<sup>−

5</sup> to about 0.00000846 mm<sup>−

5</sup>.