Free form lens design and method for preventing and/or slowing myopia progression

Patent metadata

Field	Value
Publication number	US-9733494-B2
Application number	US-201414472530-A
Country	US
Kind code	B2
Filing date	Aug 29, 2014
Priority date	Aug 29, 2014
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

Lenses incorporate freeform power profiles that at least one of slow, retard or preventing myopia progression. An ophthalmic lens includes a first zone at a center of the lens; a first peripheral region continuously extending from the center, the first peripheral region having a different dioptric power than at the center; and a second peripheral region continuously extending from the first peripheral region and having a different dioptric power than the first peripheral region, thereby providing a continuous freeform power profile having substantially equivalent visual performance to a single vision lens, and having a depth of focus and reduced retinal image quality sensitivity that slows, retards, or prevents myopia progression.

First claim

What is claimed is:

1. An ophthalmic lens for at least one of slowing, retarding or preventing myopia progression, the ophthalmic lens comprising:
a first zone at a center of the ophthalmic lens;
a first peripheral region continuously extending from the center, said first peripheral region having a different dioptric power than at said center; and
a second peripheral region continuously extending from the first peripheral region and having a different dioptric power than that of the first peripheral region, thereby providing a continuous free form power profile having substantially equivalent visual performance to a single vision lens, and having a depth of focus and reduced retinal image quality sensitivity that slows, retards, or prevents myopia progression, the continuous free form power profile given by
P ( r )= P PCHIP ( r )+24√5 ×SA ×( r 2 / 3.25 4 )−12√5×( SA/ 3.25 2 ),

wherein P represents the dioptric power (D); r represents a radial distance from a geometric lens center; SA represents an amount of spherical aberration; and P PCHIP (r) represents a Piecewise Cubic Hermite Interpolating Polynomial curve control by number of points, wherein for SA equal to −0.74 D/mm 2 , the free form power profile is P(r) is calculated utilizing r values of 0.00 mm, 0.81 mm 1.63 mm, 2.44 mm and 3.25 mm with corresponding P PCHIP (r) values of −0.23 D, −0.64 D, −0.94 D, 0.21 D and 1.04 D respectively.

2. The ophthalmic lens according to claim 1 , wherein the reduced retinal image quality sensitivity is in a range of +1.50 to −1.50 at accommodative states ranging from 1D to 5D.

3. The ophthalmic lens according to claim 1 , wherein the reduced retinal image quality sensitivity is in a range of +0.50 to −0.75 at accommodative states ranging from 1D to 5D.

4. The ophthalmic lens according to claim 1 , further comprising a third peripheral region continuously extending from the second peripheral region and having a different dioptric power than that of the second peripheral region.

5. The ophthalmic lens according to claim 4 , wherein the power decreases after the third peripheral region to a margin of the pupil.

6. The ophthalmic lens according to claim 4 , wherein the power increases after the third peripheral region to a margin of the pupil.

7. The ophthalmic lens according to claim 1 , wherein power at the center of the ophthalmic lens is more positive than the paraxial power and the power decreases to a value in the first peripheral region that is substantially similar to the paraxial power.

8. The ophthalmic lens according to claim 7 , wherein power at the center of the lens is 1.50 to 2.00 diopters more positive than the paraxial power.

9. The ophthalmic lens according to claim 7 , wherein the first peripheral region is 1.5 to 2.0 mm away from the center of the ophthalmic lens.

10. The ophthalmic lens according to claim 1 , wherein the power at the center of the ophthalmic lens substantially corresponds to the paraxial power and the power increases to a more positive value than the paraxial power in the first peripheral region.

11. The ophthalmic lens according to claim 10 , wherein the power in the first peripheral region is 1 to 1.5 diopters more plus than the paraxial power.

12. The ophthalmic lens according to claim 10 , wherein the first peripheral region is 0.5 to 1 mm away from the center of the ophthalmic lens.

13. The ophthalmic lens according to claim 1 , wherein power increases between the first peripheral region and the second peripheral region.

14. The ophthalmic lens according to claim 1 , further comprising an outer region having one or more stabilization mechanisms.

15. The ophthalmic lens according to claim 1 , wherein the continuous free form power profile is adjustable based upon pupil size to achieve a balance between foveal vision correction and an effective depth of focus and reduced retinal image quality sensitivity for treating myopia progression.

16. The ophthalmic lens according to claim 1 , wherein the ophthalmic lens comprises a contact lens.

17. The ophthalmic lens according to claim 1 , wherein the ophthalmic lens comprises a spectacle lens.

18. The ophthalmic lens according to claim 1 , wherein the ophthalmic lens comprises an intraocular lens, a corneal inlay, or a corneal onlay.

19. A method for at least one of slowing, retarding or preventing myopia progression by:
providing an ophthalmic lens having a continuous freeform power profile having substantially equivalent visual performance to a single vision lens, and having a depth of focus and reduced retinal image quality sensitivity that slows, retards, or prevents myopia progression, said continuous free form power profile comprising a first zone at a center of the ophthalmic lens; a first peripheral region continuously extending from the center and having a different dioptric power that at said center; and a second peripheral region continuously extending from the first peripheral region and having a different dioptric power than that of the first peripheral region; and altering the growth of the eye, the continuous free form power profile given by
P ( r )= P PCHIP ( r )+24√5 ×SA ×( r 2 / 3.25 4 )−12√5×( SA/ 3.25 2 ),

wherein P represents the dioptric power (D); r represents a radial distance from a geometric lens center; SA represents an amount of spherical aberration; and P PCHIP (r) represents a Piecewise Cubic Hermite Interpolating Polynomial curve control by number of points, wherein for SA equal to −0.74 D/mm 2 , the free form power profile is P(r) is calculated utilizing r values of 0.00 mm, 0.81 mm 1.63 mm, 2.44 mm and 3.25 mm with corresponding P PCHIP (r) values of −0.23 D, −0.64 D, −0.94 D, 0.21 D and 1.04 D respectively.

20. The method according to claim 19 , wherein the reduced retinal image quality sensitivity is in a range of +1.50 to −1.50 at accommodative states ranging from 1D to 5D.

21. The method according to claim 19 , wherein the reduced retinal image quality sensitivity is in a range of +0.50 to −0.75 at accommodative states ranging from 1D to 5D.

22. The method according to claim 19 , wherein the ophthalmic lens comprises a contact lens.

23. The method according to claim 19 , wherein the ophthalmic lens comprises an intraocular lens, a corneal inlay, or a corneal onlay.

24. The method according to claim 19 , further comprising adjusting the continuous free form power profile based on pupil size to achieve a balance between foveal vision correction and an effective depth of focus and reduced retinal image quality sensitivity for treating myopia progression.

25. The method according to claim 19 , further comprising adding one or more stabilization into the ophthalmic lens.

26. An ophthalmic lens for at least one of slowing, retarding or preventing myopia progression, the ophthalmic lens comprising:
a first zone at a center of the ophthalmic lens;
a first peripheral region continuously extending from the center, said first peripheral region having a different dioptric power than at said center; and
a second peripheral region continuously extending from the first peripheral region and having a different dioptric power than that of the first peripheral region, thereby providing a continuous free form power profile having substantially equivalent visual performance to a single vision lens, and having a depth of focus and reduced retinal image quality sensitivity that slo

Assignees

• Johnson & Johnson Vision Care

Inventors

• Brennan Noel A
• Chehab Khaled A
• Cheng Xu
• Moody Kurt John
• Roffman Jeffrey H
• Wei Xin

Classifications

• A61F2/16

  Intraocular lenses · CPC title

• G02C7/041

  bifocal; multifocal · CPC title

• G02C7/06 Primary

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

• G02C7/044 Primary

  Annular configuration, e.g. pupil tuned · CPC title

• G02C2202/24

  Myopia progression prevention · CPC title