Ophthalmic lens, systems and methods with angular varying phase delay

• US 8,444,267 B2
• Filed: 12/17/2010
• Issued: 05/21/2013
• Est. Priority Date: 12/18/2009
• Status: Active Grant

• Current Assignee: Amo Groningen B.V (Johnson & Johnson)
• Original Assignee: Amo Groningen B.V (Johnson & Johnson)
• Inventors: Weeber, Hendrik A., Catlin, Scott J.
• Primary Examiner(s): Collins, Darryl J
• Application Number:
  US12/971,889
• Publication Number:
  US 20110317124A1
• Time in Patent Office: 886 Days
• Field of Search: 351/159.01, 351/159.02, 35115911-15913, 351/159.15, 351/159.26, 351/159.35, 351/159.44, 35115974-15977, 623 511- 516, 623 611- 662
• US Class Current: 351/159.44
• CPC Class Codes: A61B 2034/104 Modelling the effect of the tool, e.g. the effect of an implanted prosthesis or for predicting the effect of ablation or burring
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61F 2/16 Intraocular lenses
• 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: A61F 2/164 Aspheric lenses
• CPC Class Codes: A61F 2/1645 Toric lenses
• CPC Class Codes: A61F 2/1654 Diffractive lenses
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: G02B 27/0075 with means for altering, e.g. increasing, the depth of field or depth of focus
• CPC Class Codes: G02C 2202/20 Diffractive and Fresnel lenses or lens portions
• CPC Class Codes: G02C 7/022 Ophthalmic lenses having special refractive features achieved by special materials or material structures G02C7/049 takes precedence
• CPC Class Codes: G02C 7/027 considering wearer's parameters
• CPC Class Codes: G02C 7/041 bifocal; multifocal
• CPC Class Codes: G02C 7/044 Annular configuration, e.g. pupil tuned
• CPC Class Codes: G02C 7/049 Contact lenses having special fitting or structural features achieved by special materials or material structures
• CPC Class Codes: G02C 7/06 bifocal; multifocal ; progressive G02C7/041 takes precedence
• CPC Class Codes: G02C 7/061 Spectacle lenses with progressively varying focal power

Abstract

An ophthalmic lens, such as an intraocular lens (IOL), a phakic IOL or a corneal implant, and a system and method relating to same, having coupled thereto one or more rotationally asymmetric and/or non-continuous diffractive zones, such as for providing improved multifocal vision correction.

Claims

1. An ophthalmic lens, comprising:

an anterior face and a posterior face, the faces disposed about an optical axis;

at least one diffractive region imposed on the anterior face or the posterior face, comprising a plurality of diffractive echelettes with stepheights that cause a phase delay, wherein the stepheights of each echelette vary tangentially as a function of rotational angle and wherein the phase delay varies tangentially as a function of rotational angle.

2. The ophthalmic lens of claim 1, wherein the diffractive region is located within an angular section of the optic.

3. The ophthalmic lens of claim 1, wherein the diffractive region is within an angular section that covers between 5 and 66% of the optic.

4. The ophthalmic lens of claim 3, wherein the stepheights within an angular section of an optic, transition from the stepheight of one adjacent zone to the stepheight of another adjacent zone.

5. The ophthalmic lens of claim 3, wherein the stepheights Within an angular section of an optic, transition from the stepheight of one diffractive zone to the stepheight of an adjacent monofocal zone.

6. The ophthalmic lens of claim 3, wherein the stepheights within an angular section of an optic, transition from the stepheight of one diffractive zone to another adjacent refractive zone.

7. An ophthalmic lens, comprising:

an optic having an anterior surface, a posterior surface, and an optical axis, the optic comprising;

at least one refractive region associated with at least one of the anterior surface and the posterior surface; and

at least one diffractive region comprising a plurality of diffractive echelettes, each echelette having a rotational asymmetry with respect to the optical axis, the diffractive region having at least two diffractive orders with associated diffractive optical powers configured for forming, in conjunction with the at least one refractive region, at least a first focus and a second focus.

8. The ophthalmic lens of claim 7, wherein the refractive region comprises from about 33% to about 66% of the optic.

9. The ophthalmic lens of claim 7, wherein light at a design wavelength that is incident on the ophthalmic lens is split between the zeroeth diffraction order and the first diffraction order to form the first focus and the second focus.

10. The ophthalmic lens of claim 7, wherein each echelette comprises a step height that varies rotationally as a function of the rotational angle.

11. The ophthalmic lens of claim 7, wherein the plurality of diffractive echelettes comprises:

a first section comprising a monofocal diffractive pattern having a first one of the associated diffractive optical powers; and

a second section comprising a plurality of multifocal transitions.

12. The ophthalmic lens of claim 11, wherein the plurality of multifocal transitions comprise a transition from about 100 percent to the first focus to about 100 percent to the second focus.

13. The ophthalmic lens of claim 11, wherein the plurality of diffractive echelettes further comprises a third region comprising a variable focus between the first focus and the second focus.

14. The ophthalmic lens of claim 13, wherein the variable focus comprises about 25 percent to the first focus comprising a near focus, and about 75 percent to the second focus comprising a distant focus.