LENSES, DEVICES, METHODS AND SYSTEMS FOR REFRACTIVE ERROR

• US 20150185501A1
• Filed: 04/09/2013
• Published: 07/02/2015
• Est. Priority Date: 04/05/2012
• Status: Active Grant

• Current Assignee: Brien Holden Vision Institute
• Original Assignee: Brien Holden Vision Institute
• Inventors: Bakaraju, Ravi Chandra, Ho, Arthur, Holden, Brien Anthony, Ehrmann, Klaus
• Granted Patent: US 9,535,263 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 3/0025 characterised by electronic signal processing, e.g. eye models
• CPC Class Codes: A61B 3/1015 for wavefront analysis
• CPC Class Codes: A61F 2/14 Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
• CPC Class Codes: A61F 2/145 Corneal inlays, onlays, or lenses for refractive correction
• CPC Class Codes: A61F 2/1451 Inlays or onlays
• 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 2002/1681 having supporting structure for lens, e.g. haptics
• CPC Class Codes: G02C 2202/22 Correction of higher order and chromatic aberrations, wave front measurement and calculation
• CPC Class Codes: G02C 2202/24 Myopia progression prevention
• CPC Class Codes: G02C 7/02 Lenses; Lens systems ; Methods of designing lenses
• 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 7/04 Contact lenses for the eyes disinfection or sterilisation of contact lenses A61L12/00
• CPC Class Codes: G02C 7/041 bifocal; multifocal
• 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
• CPC Class Codes: G02C 7/083 Electrooptic lenses

Abstract

The present disclosure is directed to lenses, devices, methods and/or systems for addressing refractive error. Certain embodiments are directed to changing or controlling the wavefront of the light entering a human eye. The lenses, devices, methods and/or systems can be used for correcting, addressing, mitigating or treating refractive errors and provide excellent vision at distances encompassing far to near without significant ghosting. The refractive error may for example arise from myopia, hyperopia, or presbyopia with or without astigmatism. Certain disclosed embodiments of lenses, devices and/or methods include embodiments that address foveal and/or peripheral vision. Exemplary of lenses in the fields of certain embodiments include contact lenses, corneal onlays, corneal inlays, and lenses for intraocular devices both anterior and posterior chamber, accommodating intraocular lenses, electro-active spectacle lenses and/or refractive surgery.

Claims

1. A lens for an eye, the lens having an optical axis, a focal distance and wherein the lens comprises:

an aberration profile along the optical axis, the aberration profile;

including higher order aberrations having at least one of a primary spherical aberration component C(4,0) and a secondary spherical aberration component C(6,0), herein the aberration profile provides, for a model eye with no aberrations and an on-axis length equal to the focal distance;

a retinal image quality (RIQ) with a through focus slope that degrades in a direction of eye growth; and

a RIQ of at least 0.3

wherein the RIQ is Visual Strehl Ratio measured substantially along the optical axis for at least one pupil diameter in the range 3 mm to 6 mm, over a spatial frequency range of 0 to 30 cycles/degree inclusive and at a wavelength selected from within the range 540 nm to 590 nm inclusive.

3. The lens according to claim 1, wherein the focal distance is a prescription focal distance for a myopic eye and wherein the focal distance differs from the focal distance for a C(2,0) Zernike coefficient of the aberration profile.

5. The lens according to claim 1, wherein the lens is used for myopia control with or without astigmatism.

7. The lens according to claim 1, wherein the higher order aberrations include at least two spherical aberration terms selected from the group C(4,0) to C(20,0).

8. The lens according to claim 1, wherein the higher order aberrations include at least three spherical aberration terms selected from the group C(4,0) to C(20,0).

9. The lens according to claim 1, wherein the magnitude of higher order aberrations included is at least 0.02 um over a 3 mm, 4 mm, 5 mm or 6 mm pupil diameter.

10. The lens according to claim 1, wherein the average slope over a horizontal field of at least −

20°

to +20°

degrades in a direction of eye growth.

11. The lens according to claim 1, wherein the average slope over a vertical field of at least −

20°

to +20°

degrades in a direction of eye growth.

14. The lens according to claim 1, wherein the aberration profile provides a RIQ of at least 0.3 at the focal length substantially across the pupil diameters in the range 3 mm to 6 mm.

15. The lens according to claim 1, wherein the aberration profile provides a RIQ with a through focus slope that degrades in a direction of eye growth when primary or secondary astigmatism is added to the aberration profile.

16. The lens according to claim 1, wherein the RIQ is characterised by:

2. A lens for an eye, the lens having an optical axis, a focal distance and wherein the lens comprises an aberration profile about the optical axis, the aberration profile:

including higher order aberrations having at least one of a primary spherical aberration component C(4,0) and a secondary spherical aberration component C(6,0), herein the aberration profile provides, for a model eye with no aberrations, or substantially no, aberrations, and an on-axis length equal to, or substantial equal to, the focal distance;

a retinal image quality (RIQ) with a through focus slope that improves in a direction of eye growth; and

a RIQ of at least 0.3;

wherein the RIQ is Visual Strehl Ratio measured substantially along the optical axis for at least one pupil diameter in the range 3 mm to 6 mm, over a spatial frequency range of 0 to 30 cycles/degree inclusive and at a wavelength selected from within the range 540 nm to 590 nm inclusive.

4. The lens according to claim 2, wherein the focal distance is a prescription focal distance for a hyperopic eye and wherein the focal distance differs from the focal distance for a C(2,0) Zernike coefficient of the aberration profile.

6. The lens according to claim 2, wherein the lens is used for hyperopia treatment with or without astigmatism.

12. The lens according to claim 2, wherein the average slope over a horizontal field of at least −

20°

to +20°

improves in a direction of eye growth.

13. The lens according to claim 2, wherein the average slope over a vertical field of at least −

20°

to +20°

improves in a direction of eye growth.

17. A lens for an eye, the lens having an optical axis, a focal distance and wherein the lens comprises:

an aberration profile about the optical axis;

the aberration profile including higher order aberrations having at least one of a primary spherical aberration component C(4,0) and a secondary spherical aberration component C(6,0), wherein the aberration profile provides, for a model eye with no aberrations, or substantially no, aberrations, and an on-axis length equal to, or substantial equal to, the focal distance;

a peak Visual Strehl Ratio (first Visual Strehl Ratio) within a through focus range;

a Visual Strehl Ratio that remains at or above a second Visual Strehl Ratio over the through focus range that includes said focal distance, wherein the first Visual Strehl Ratio is at least 0.35, the second Visual Strehl Ratio is at least 0.1 and the through focus range is at least 1.8 Dioptres; and

Wherein the RIQ is Visual Strehl Ratio measured substantially along the optical axis for at least one pupil diameter in the range 3 mm to 6 mm, over a spatial frequency range of 0 to 30 cycles/degree inclusive and at a wavelength selected from within the range 540 nm to 590 nm inclusive.

18. The lens according to claim 17, wherein the first Visual Strehl Ratio is selected from a group comprising:

at least 0.4, at least 0.5, at least 0.6 and at least 0.7.

19. The lens according to claim 17, wherein the first Visual Strehl Ratio is selected from a group comprising:

at least 0.1, at least 0.12, at least 0.14, at least 0.16, at least 0.18 and at least 0.2.

20. The lens according to claim 17, wherein the through focus range is selected from a group comprising:

at least 1.9, at least 2, at least 2.1, at least 2.2, at least 2.3, at least 2.4 and at least 2.5 Dioptres.

21. The lens according to claim 17, wherein the lens has a prescription focal distance located within 0.25 Dioptres of an end of the through focus range.

22. The lens according to claim 21, wherein through focus range has a negative power end and positive power end and wherein the end of the through focus range is the negative power end.

23. The lens according to claim 21, wherein through focus range has a negative power end and positive power end and wherein the end of the through focus range is the positive power end.

24. The lens according to claim 17, wherein the Visual Strehl Ratio remains at or above the second Visual Strehl Ratio over a range of pupil diameters of at least 1.5 mm.

25. The lens of according to claim 17, wherein the combination of higher order aberrations includes at least one of primary spherical aberration and secondary spherical aberration.

26. The lens according to claim 17, wherein the higher order aberrations include at least two spherical aberration terms selected from the group C(4,0) to C(20,0).

27. The lens according to claim 17, wherein the higher order aberrations include at least three spherical aberration terms selected from the group C(4,0) to C(20,0).

28. The lens according to claim 17, wherein the RIQ for every field angle over a horizontal field of at least −

20°

to +20°

is at least 0.3, 0.35 or 0.4.

29. A method for a myopic eye, with or without astigmatism, with a first set of aberrations comprising and providing for the eye, at least one of a lens, optical device, and altered corneal shape, a second combination of aberrations, the second combination of aberrations comprising higher order aberrations, wherein a total combination of the first and second combinations provides a through-focus retinal image quality that does not improve in the direction of eye growth.

30. The method according to claim 29, wherein the total combination provides a through-focus retinal image quality that has instantaneous gradient at or near a retina of the eye that degrades in the direction of eye growth.

31. A method for a hyperopic eye, with or without astigmatism, with a first set of aberrations comprising providing, for the eye, at least one of a lens, optical device, and altered corneal shape, a second combination of aberrations, second combination of aberrations comprising higher order aberrations, wherein a total combination of the first and second combinations provides a through-focus retinal image quality that improves in the direction of eye growth.

32. The method according to claim 31, wherein the total combination provides a through-focus retinal image quality that has instantaneous gradient at or near a retina of the eye that improves in the direction of eye growth.