Limited echelette lens, systems and methods

• US 8,480,228 B2
• Filed: 12/17/2010
• Issued: 07/09/2013
• 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.
• Primary Examiner(s): Collins, Darryl J
• Application Number:
  US12/971,607
• Publication Number:
  US 20110317126A1
• Time in Patent Office: 935 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
• 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

Systems and methods for providing enhanced image quality across a wide and extended range of foci encompass vision treatment techniques and ophthalmic lenses such as contact lenses and intraocular lenses (IOLs). Exemplary IOL optics can include a circular surface structure with limited adjacent echelettes which act as a diffractive or phase shifting profile.

Claims

1. An ophthalmic lens comprising:

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

at least one diffractive profile imposed on the anterior face or the posterior face, the at least one diffractive profile comprised of an inner echelette and between 1 and 4 peripheral echelettes, wherein at least 2 echelettes are not adjacent to each other and are separated by a refractive region; and

wherein the inner echelette and the peripheral echelette(s) are not separated by a refractive region.

2. The ophthalmic lens of claim 1, wherein the inner echelette has a diameter within a range from about 1 mm to about 5 mm.

3. The ophthalmic lens of claim 1, wherein the lens further comprises a peripheral portion characterized by a spherical curve or an aspherical curve.

4. The ophthalmic lens of claim 1, wherein the inner and peripheral echelettes are characterized by a surface area between 1 and 7 square millimeters.

5. The ophthalmic lens of claim 1 , wherein the echelettes further comprise of transitions characterized by a step height having a value within a range from about 0.5 μ

m and about 4 μ

m.

6. The ophthalmic lens of claim 5, wherein the step heights provide a phase shift between about 0.25 and about 3 times the design wavelength.

7. The ophthalmic lens of claim 5, wherein the step height for at least 2 echelettes differ.

8. The ophthalmic lens of claim 5, wherein the surface area for at least 2 echelettes differ.

9. An ophthalmic lens comprising:

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

at least one diffractive profile imposed on the anterior face or the posterior face, the at least one diffractive profile comprised of an inner echelette and between 1 and 4 peripheral echelettes, wherein at least 2 echelettes are not adjacent to each other and are separated by a refractive region; and

wherein the inner and peripheral echelettes are characterized by a surface area between 1 and 7 square millimeters.

10. The ophthalmic lens of claim 9, wherein the inner echelette has a diameter within a range from about 1 mm to about 5 mm.

11. The ophthalmic lens of claim 9, wherein the lens further comprises a peripheral portion characterized by a spherical curve or an aspherical curve.

12. The ophthalmic lens of claim 9, wherein the echelettes further comprise of transitions characterized by a step height having a value within a range from about 0.5 μ

m and about 4 μ

m.

13. The ophthalmic lens of claim 12, wherein the step heights provide a phase shift between about 0.25 and about 3 times the design wavelength.

14. The ophthalmic lens of claim 12, wherein the step height for at least 2 echelettes differ.

15. The ophthalmic lens of claim 12, wherein the surface area for at least 2 echelettes differ.

16. An ophthalmic lens comprising:

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

at least one diffractive profile imposed on the anterior face or the posterior face, the at least one diffractive profile comprised of an inner echelette and between 1 and 4 peripheral echelettes, wherein at least 2 echelettes are not adjacent to each other and are separated by a refractive region; and

wherein the inner and peripheral echelettes have the same surface area.

17. The ophthalmic lens of claim 16, wherein the inner and peripheral echelettes are characterized by a surface area between 1 and 7 square millimeters.

18. The ophthalmic lens of claim 16, wherein the inner echelette and the peripheral echelette(s) are not separated by a refractive region.

19. The ophthalmic lens of claim 16, wherein the inner echelette has a diameter within a range from about 1 mm to about 5 mm.

20. The ophthalmic lens of claim 16, wherein the lens further comprises a peripheral portion characterized by a spherical curve or an aspherical curve.

21. The ophthalmic lens of claim 16, wherein the echelettes further comprise of transitions characterized by a step height having a value within a range from about 0.5 μ

m and about 4 μ

m.

22. The ophthalmic lens of claim 21, wherein the step heights provide a phase shift between about 0.25 and about 3 times the design wavelength.

23. The ophthalmic lens of claim 21, wherein the step height for at least 2 echelettes differ.

24. The ophthalmic lens of claim 21, wherein the surface area for at least 2 echelettes differ.