Single microstructure lens, systems and methods

Patent metadata

Field	Value
Publication number	US-10180585-B2
Application number	US-201715438628-A
Country	US
Kind code	B2
Filing date	Feb 21, 2017
Priority date	May 13, 2008
Publication date	Jan 15, 2019
Grant date	Jan 15, 2019

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 which acts as a diffractive or phase shifting profile. In some cases, a single ring IOL includes an anterior face and a posterior face, where a profile can be imposed on the anterior or posterior surface or face. The profile can have an inner portion such as a microstructure or central echelette, and an outer portion. Between the inner portion and the outer portion, there may be a transition zone that connects the inner and outer portions.

First claim

What is claimed is:

1. An ophthalmic lens comprising:
an anterior face and a posterior face, the faces disposed about an optical axis;
a central echelette imposed on the anterior or the posterior face;
a central zone; and
a peripheral zone that surrounds the central echelette,
wherein the lens provides an MTF volume of at least about 35% over a continuous range of diffractive power of at least about 0.75 D.

2. The ophthalmic lens of claim 1 , wherein one or both of the anterior and the posterior face have a diffractive profile.

3. The ophthalmic lens of claim 1 , wherein one or both of the anterior and the posterior face have a toric profile.

4. The ophthalmic lens of claim 1 , wherein the central echelette is disposed within the central zone of the lens.

5. The ophthalmic lens of claim 1 , wherein the central echelette surrounds the central zone of the lens.

6. The ophthalmic lens of claim 1 , wherein the central echelette is characterized by a constant phase shift.

7. The ophthalmic lens of claim 1 , wherein the central echelette is characterized by a surface area between 1 and 7 square millimeters.

8. The ophthalmic lens of claim 7 , wherein the central echelette has a diameter within a range from about 1 mm to about 5 mm.

9. The ophthalmic lens of claim 1 wherein the central echelette is characterized by a parabolic curve.

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

11. The ophthalmic lens of claim 10 , wherein the peripheral portion has a refractive profile.

12. The ophthalmic lens of claim 1 , wherein the ophthalmic lens comprises a transition characterized by a step height having a value within a range from about 0.5 μm and about 4 μm.

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

14. The ophthalmic lens of claim 1 , wherein the ophthalmic lens provides an MTF at 50 cycles per millimeter of at least about 15 over a continuous range of diffractive power of at least about 1.5 D for a 3.0 mm pupil.

15. The ophthalmic lens of claim 1 , wherein the ophthalmic lens provides an MTF at 100 cycles per millimeter of at least about 7 over a continuous range of diffractive power of at least about 1.8 D for a 3.0 mm pupil.

Assignees

• Amo Groningen Bv

Inventors

• Weeber Hendrik A

Classifications

• A61F2/164

  Aspheric lenses · CPC title

• G02C7/06

  bifocal; multifocal {; progressive (G02C7/041 takes precedence)} · CPC title

• A61F2/1654

  Diffractive lenses · CPC title

• G02C7/022 Primary

  Ophthalmic lenses having special refractive features achieved by special materials or material structures (G02C7/049 takes precedence) · CPC title

• A61F2/1613

  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 title