SINGLE MICROSTRUCTURE LENS, SYSTEMS AND METHODS

• US 20110149236A1
• Filed: 12/17/2010
• Published: 06/23/2011
• 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.
• Granted Patent: US 8,430,508 B2
• Time in Patent Office: Days
• US Class Current: 351/177
• 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 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.

Claims

1. An ophthalmic lens comprising:

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

an isolated echelette imposed on the anterior or the posterior face.

2. The ophthalmic lens of claim 1, wherein the anterior and/or posterior face has a diffractive profile.

3. The ophthalmic lens of claim 1, wherein the anterior and/or posterior face has a toric profile.

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

5. The ophthalmic lens of claim 1, wherein the echelette is disposed within an annular ring surrounding a central refractive zone of the lens.

6. The ophthalmic lens of claim 5, wherein the lens comprises a peripheral zone that surrounds the annular ring.

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

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

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

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

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

13. The ophthalmic lens of claim 1, wherein the ophthalmic lens further comprises a transition characterized by a step height having a value within a range from about 0.5 μ

m and about 4 μ

m.

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

15. The ophthalmic lens of claim 1, wherein the lens provides an MTF volume of at least 35% over a range of at least about 0.75 D

12. The ophthalmic lens of claim 12, wherein the peripheral portion has a refractive profile.

16. An ophthalmic lens, comprising:

a diffractive primary zone that presents a base diffractive surface having a purely optical function; and

a refractive peripheral zone that surrounds the diffractive primary zone.

17. The ophthalmic lens of claim 16, further comprising a transition zone that physically connects the diffractive primary zone with the refractive peripheral zone, wherein the transition zone optionally provides optical characteristics

18. The ophthalmic lens of claim 16, further comprising an echelette, wherein the diffractive primary zone is characterized by a first constant phase shift, and the echelette is characterized by a second constant phase shift that is equal to or different from the first constant phase shift.

19. A method of designing an ophthalmic lens comprised of utilizing pupil size measurements and based on the measurements determining the size of an isolated echelette to impose on the surface of a lens.

20. A lens/method according to claim 20, in which the measurements are based on the pupil sizes of a group of patients.