Intra-ocular device with multiple focusing powers/optics

• US 8,262,728 B2
• Filed: 05/10/2010
• Issued: 09/11/2012
• Est. Priority Date: 02/09/2006
• Status: Active Grant

• Current Assignee: Alcon Incorporated
• Original Assignee: Novartis Ag
• Inventors: Zhang, Xiaoxiao, Mackool, Richard J., Hong, Xin, Southard, Michael A.
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): SHAY, RANDY CITRIN
• Application Number:
  US12/776,807
• Publication Number:
  US 20100286771A1
• Time in Patent Office: 855 Days
• Field of Search: 623/6.17, 623/6.23, 623/6.24, 623/6.25, 623/6.27, 623/6.28, 623/6.3, 623/6.31
• US Class Current: 623/6.25
• CPC Class Codes: A61F 2/1618 Multifocal lenses
• CPC Class Codes: A61F 2/1654 Diffractive lenses

Abstract

An intraocular lens device that includes an intraocular lens optics that provides at least two powers of magnification one being near vision power and the other being distance vision power. The lens optics has surface modulations that are responsible for providing the near vision power. The zone structure provides an add power of over 6 diopters. The add power indicative of an extent that the near vision focusing power is greater than the distance vision focusing power.

Claims

1. An intraocular lens comprising, an optic that provides at least two powers of magnification, one being near vision power and another being distance vision power, the optic having a plurality of surface modulations configured to achieve add power indicative of an extent that the near vision focusing power is greater than the distance vision focusing power of the optic, the surface modifications providing the add power to be greater than 6 diopters and having a plurality of zones radially spaced from each other.

2. An intraocular lens comprising, an optic that provides at least two powers of magnification, one being near vision power and another being distance vision power, the optic having a plurality of surface modulations within a diffractive zone structure that are configured to achieve light interference for creating add power indicative of an extent that the near vision focusing power is greater than the distance vision focusing power of the optic, the diffractive zone structure providing the add power to be greater than 6 diopters and having a plurality of diffractive zones radially spaced from each other each with at least one of the plurality of surface modulations, the diffractive zone structure being defined as a function of the add power in accord with

r_i²=(2i+1)λ

f

wherein

r_i denotes a radial distance of each of the diffractive zones,

i denotes a zone number for which a central zone is denoted by i=0,

λ

denotes a design wavelength, and

f denotes an add power.

3. The lens of claim 2, wherein the optic is either bifocal or multifocal.

4. The lens of claim 2, wherein the surface modulation is a sawtooth configuration.

5. The lens of claim 4, wherein the sawtooth configuration has a step height equal to

6. The lens of claim 5, wherein the scaling function f_apodize is in accord with

7. The lens of claim 6, wherein a value of the f_apodize is one, a value of α

is two.

8. The lens of claim 6, wherein the diffraction zone structure is formed to resemble a series of ring configurations of different diameters.

9. The lens of claim 2, wherein the optic is telescopic because of the at least two powers with magnification, further comprising optically aligning the telescopic optic with a non-telescopic optic, the non-telescopic optic lacking multiple powers of magnification.