Multifocal Intraocular Lens

• US 20100100177A1
• Filed: 10/20/2008
• Published: 04/22/2010
• Est. Priority Date: 10/20/2008
• Status: Active Grant

• Current Assignee: Johnson & Johnson Surgical Vision, Inc. (Johnson & Johnson)
• Original Assignee: Advanced Medical Optics Incorporated (Johnson & Johnson)
• Inventors: Zhao, Huawei
• Granted Patent: US 8,771,348 B2
• Time in Patent Office: Days
• US Class Current: 623/6.240
• 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: A61F 2/1654 Diffractive lenses
• CPC Class Codes: G02C 2202/20 Diffractive and Fresnel lenses or lens portions
• CPC Class Codes: G02C 2202/22 Correction of higher order and chromatic aberrations, wave front measurement and calculation
• CPC Class Codes: G02C 7/028 Special mathematical design techniques
• CPC Class Codes: G02C 7/042 Simultaneous type
• CPC Class Codes: G02C 7/048 Means for stabilising the orientation of lenses in the eye

Abstract

The invention provides an IOL, a method of making the IOL, and a method of using the IOL, wherein the IOL includes a central region and an outer region. An ophthalmic lens comprises a central region and an outer region. the central region is disposed about an optical axis and comprises a diffractive pattern having an add power. the central region also has a first power and a second power for visible light. the first power is a power for far focus and the second power equals to the sum of the power for far focus and the add power. the outer region encloses the central region and generally has no multifocal diffractive power. At least a portion of the outer region has a curvature that varies with distance from the optical axis. the outer region may include a peripheral region and at least one intermediate region that encloses the central region, wherein the peripheral region encloses the at least one intermediate region and the at least one intermediate region provides at least one intermediate power that is different from the first power and the second power.

Claims

1. An ophthalmic lens comprising:

a central region disposed about an optical axis and comprising a diffractive pattern having multifocal diffractive power, the multifocal diffractive power comprising a first diffractive power and a second diffractive power for visible light, the central region having a base power and an add power equal to a difference between the first diffractive power and the second diffractive power; and

an outer region disposed about the central region having no multifocal diffractive power;

at least a portion of the outer region having a refractive power that varies with distance from the optical axis.

2. The ophthalmic lens of claim 1, wherein the refractive power varies by at least 1 Diopter.

3. The ophthalmic lens of claim 1, wherein the outer region comprises a first region having a near focus or an intermediate focus, and a second region disposed about the first region having a distant focus.

4. The ophthalmic lens of claim 1, wherein the outer region comprises a first region having a near focus or an intermediate focus, and a second region disposed about the first region having a distant focus, the first region comprising inner zone, an outer zone disposed about the inner zone, and one or more intermediate zone disposed between the inner zone and the outer zone.

5. The ophthalmic lens of claim 4, wherein the zones are disposed to decrease in power with increasing radius from the optical axis.

6. The ophthalmic lens of claim 4, wherein the inner zone has a power that is between the add power and the power of the one or more intermediate zone(s), and the outer zone has a power that is between a power of the outer zone and any power of the one or more intermediate zone(s).

7. The ophthalmic lens of claim 4, wherein the inner zone has a power that is between the add power and the power of the one or more intermediate zone(s), and the outer zone has a power that is between the base power and any power of the one or more intermediate zone(s).

8. The ophthalmic lens of claim 1, wherein the power of the outer region monotonically decreases with increasing radius from the optical axis.

9. The ophthalmic lens of claim 1, wherein the add power is selected to provide at least one of near vision and intermediate vision.

10. The ophthalmic lens of claim 1, wherein the diffractive pattern has a primary diffractive order and a secondary diffractive order, the add power corresponding to light contained in the first diffractive order.

11. The ophthalmic lens of claim 10, wherein the first diffractive power is from a zeroth diffractive order of the diffractive pattern and the second diffractive power is from a first diffractive order of the diffractive pattern, or wherein the first diffractive power is from the first diffractive order, the second diffractive power is from a second diffractive order of the diffractive pattern, and the base power is produced by a combination of the first diffractive order and a refractive power of the central zone.

12. The ophthalmic lens of claim 1, wherein a power variation of the outer region is greater than a power variation of a spherical ophthalmic lens having a paraxial power equal to the first power of the central region.

13. The ophthalmic lens of claim 1, wherein at least one of the central region and the outer region provides an extended depth of focus compared to a reference lens having a single power equal to a power of the outer region.

14. The ophthalmic lens of claim 1, wherein the add power is between about 1.5 D and about 4.5 D.

15. The ophthalmic lens of claim 1, further comprising at least one region in which a surface of the ophthalmic lens deviates from spherical with aspheric terms designed to correct for the average monochromatic aberrations induced in light passing through an average human cornea.

16. The ophthalmic lens of claim 1, wherein the outer region comprises a diffractive pattern configured to produce a single power within the visible range of the electromagnetic radiation spectrum.

17. A method of making an ophthalmic lens including forming a central region and an outer region, the regions being disposed about an optical axis, wherein:

the central region includes a diffractive pattern that provides a first power and a second power, the first power being a power for far focus and the second power equal to the sum of the power for far focus and an add power;

the outer region encloses the central region and has no multifocal diffractive power; and

at least a portion of the outer region has a curvature that varies with distance from the optical axis.

18. The method of claim 17, wherein the outer region comprises at least one intermediate region and a peripheral region, the at least one intermediate region provides at least one intermediate power intermediate between the first power and the second power.

19. A method of using an ophthalmic lens including a central region and an outer region, the regions being disposed about an optical axis, wherein:

the central region includes a diffractive pattern that provides a first power and a second power, the first power being a power for far focus and the second power equal to the sum of the power for far focus and an add power;

the outer region encloses the central region and has no multifocal diffractive power; and

at least a portion of the outer region has a curvature that varies with distance from the optical axis

the method comprising;

surgically removing a natural lens of a subject and inserting the ophthalmic lens into the eye of the subject in the general location from which the natural lens was removed.