Multifocal ophthalmic lens with reduced halo size

• US 6,210,005 B1
• Filed: 02/04/1999
• Issued: 04/03/2001
• Est. Priority Date: 02/04/1999
• Status: Expired due to Term

• Current Assignee: Abbott Medical Optics Incorporated (Johnson & Johnson)
• Original Assignee: Valdemar Portney
• Inventors: Portney, Valdemar
• Primary Examiner(s): Epps, Georgia
• Assistant Examiner(s): SCHWARTZ, JORDAN MARC
• Application Number:
  US09/244,709
• Time in Patent Office: 789 Days
• Field of Search: 351/161, 351/160 R, 351/160 H, 351/162, 351/168, 351/169, 351/171, 623/6, 623/6.11, 623/6.24, 623/6.27, 623/6.28
• US Class Current: 351/161
• 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 2/1613 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 2002/1696 Having structure for blocking or reducing amount of light transmitted, e.g. glare reduction
• CPC Class Codes: A61F 2002/1699 Additional features not otherwise provided for
• CPC Class Codes: A61F 2250/0053 differing in optical properties
• CPC Class Codes: G02C 7/041 bifocal; multifocal
• CPC Class Codes: G02C 7/042 Simultaneous type
• CPC Class Codes: G02C 7/044 Annular configuration, e.g. pupil tuned

Abstract

Ophthalmic lenses, for example, intraocular lenses, contact lenses, corneal implant lenses and the like, have multifocal characteristics which provide beneficial reductions in at least the perception of one or more night time visual symptoms such as “halos”, and “glare or flare”.

Claims

1. An ophthalmic lens having a central optical axis and a baseline diopter power for far vision correction, the ophthalmic lens comprising:

a near zone having a highest vision correction power and including an inner region having a substantially constant vision correction power greater than the baseline diopter power, and an outer region located outwardly of the inner region and having vision correction powers which are progressively reduced from the highest vision correction power of the near zone to a reduced near vision correction power which is about 50% to about 85% of the highest vision correction power of the near zone, the inner region has an innermost end at which the lens has the substantially constant vision correction power at a radial location closest to the central optical axis and the outer region has an outermost end, each of the inner region and the outer region having a radial width and the radial width of the inner region being in a range of about 30% to about 65% of a radial distance between the innermost end of the inner region and the outermost end of the outer region, the near zone having vision correction powers greater than the baseline diopter power which reduce the size of a halo caused by passing light to the near zone relative to the halo caused by passing light to a similar near zone of a substantially identical lens in which the similar near zone has a constant vision correction power throughout.

2. The ophthalmic lens of claim 1 which further comprises an additional near zone located outwardly of the near zone and having vision correction powers greater than the baseline diopter power.

3. The ophthalmic lens of claim 2 wherein the additional near zone includes vision correction powers which diffuse a halo caused by passing light to the additional near zone relative to the halo caused by passing light to a similar additional near zone of a substantially identical lens in which the similar additional near zone has a constant vision correction power throughout.

4. The ophthalmic lens of claim 2 wherein the near zone and the additional zone each have a radial width and the radial width of the additional near zone is less than about 40% of the radial width of the near zone.

5. The ophthalmic lens of claim 2 wherein the additional near zone includes a central plateau region having an inner end and an outer end and vision correction powers which increase progressively from the inner end to the outer end.

6. The ophthalmic lens of claim 1 which is selected from the group consisting of an intraocular lens, a contact lens and a corneal implant lens.

7. The ophthalmic lens of claim 1 wherein the near zone is annular, and which further comprises a central zone having a vision correction power greater than the baseline diopter power, the near zone circumscribes the central zone.

8. The ophthalmic lens of claim 3 wherein the near zone and the additional near zone are annular and the additional near zone circumscribes the near zone.

9. An ophthalmic lens having a baseline diopter power for far vision correction, the ophthalmic lens comprising:

a central zone including a center region at a central optical axis of the ophthalmic lens and having a vision correction power, an intermediate region at a radial location outwardly of the center region and having a vision correction power which is the highest vision correction power in the central zone, and an outer region at a radial location outwardly of the intermediate region and having a vision correction power equal to the vision correction power of the center region, provided that the highest vision correction power in the central zone is at a radial location closer to the center region than to the radial location of the outer region, and the lowest optical power in the central zone is at or above the baseline diopter power.

10. The ophthalmic lens of claim 9 wherein the highest vision correction power in the central zone is at a radial location about 40% or less of the distance between the center region and the radial location of the outer region.

11. The ophthalmic lens of claim 9 which further comprises:

a first outer zone located outwardly of the central zone and having a vision correction power less than the baseline diopter power; and

a second outer zone located outwardly of the first outer zone and having a vision correction power greater than the baseline diopter power.

12. The ophthalmic lens of claim 11 wherein each of the intermediate region, the outer region, the first outer zone and the second outer zone is annular and circumscribes, in order, the center region, the intermediate region, the outer region and the first outer zone, respectively.

13. The ophthalmic lens of claim 11 wherein the second outer zone includes vision correction powers which reduce the size of a halo caused by passing light to the second outer zone relative to the halo caused by passing light to a similar second outer zone of a substantially identical lens in which the similar second outer zone has a constant vision correction power throughout.

14. The ophthalmic lens of claim 11 wherein the second outer zone has a highest vision correction power and includes an inner region having a substantially constant vision correction power and an outer region having vision correction powers which are progressively reduced from the highest vision correction power to a reduced near vision correction power which is between about 50% and about 85% of the highest vision correction power of the second outer zone, the inner region has an innermost end and the outer region has an outermost end, each of the inner and outer regions having a radial width and the radial width of the inner region being in a range of about 30% to about 85% of a radial distance between the innermost end of the inner region and the outermost end of the outer region.

15. The ophthalmic lens of claim 11 which further comprises a third outer zone located outwardly of the second outer zone and having a vision correction power greater than the baseline diopter power.

16. The ophthalmic lens of claim 15 wherein the third outer zone includes vision correction powers which diffuse a halo caused by passing light to the third outer zone relative to the halo caused by passing light to a similar third outer zone of a substantially identical lens in which the similar third outer zone has a constant vision correction power throughout.

17. The ophthalmic lens of claim 15 wherein the third outer zone has a radial width which is less than about 40% of the radial width of the second outer zone.

18. The ophthalmic lens of claim 15 wherein the third outer zone includes a central plateau region having an inner end and an outer end and vision correction powers which increase progressively from the inner end to the outer end.

19. The ophthalmic lens of claim 15 which further comprises a fourth outer zone located outwardly of the second outer zone and inwardly of the third outer zone and having vision correction powers less than the baseline diopter power.

20. The ophthalmic lens of claim 19 wherein the fourth outer zone has an inner region having a vision correction power, an intermediate region located outwardly of the inner region and having a vision correction power which is increased relative to the vision correction power of the inner region and is the highest vision correction power in the intermediate region;

and an outermost vision correction power equal to the vision correction power of the inner region, and an outer region located outwardly of the intermediate region and having a vision correction power which is the lowest vision correction power of the fourth outer zone, provided that the highest vision correction power of the fourth outer zone is located closer to the vision correction power of the inner region than to the outermost vision correction power of the intermediate region.

21. The ophthalmic lens of claim 15 wherein the first, second and third outer zones are annular and the first outer zone circumscribes the central zone, the second outer zone circumscribes the first outer zone and the third outer zone circumscribes the second outer zone.

22. The ophthalmic lens of claim 21 which further comprises a fourth outer zone located outwardly of the second outer zone and inwardly of the third outer zone and having vision correction powers less than the baseline diopter power, the fourth outer zone is annular and circumscribes the second outer zone and is circumscribed by the third outer zone.

23. The ophthalmic lens of claim 9 which is selected from the group consisting of an intraocular lens, a contact lens and a corneal implant lens.

24. An ophthalmic lens having a baseline diopter power for far vision correction, the ophthalmic lens comprising:

a near zone including an inner region having a substantially constant vision correction power greater than the baseline diopter power, and having vision correction powers greater than the baseline diopter power which reduce the size of a halo caused by passing light to the near zone relative to the halo caused by passing light to a similar near zone of a substantially identical lens in which the similar near zone has a constant vision correction power throughout; and

an additional near zone located outwardly of the near zone and having vision correction powers greater than the baseline diopter power, wherein the near zone and the additional zone each have a radial width and the radial width of the additional near zone is less than about 40% of the radial width of the near zone.

25. The ophthalmic lens of claim 24 wherein the additional near zone includes vision correction powers which diffuse a halo caused by passing light to the additional near zone relative to the halo caused by passing light to a similar additional near zone of a substantially identical lens in which the similar additional near zone has a constant vision correction power throughout.

26. The ophthalmic lens of claim 24 wherein the additional near zone includes a central plateau region having an inner end and an outer end and vision correction powers which increase progressively from the inner end to the outer end.

27. The ophthalmic lens of claim 24 which is selected from the group consisting of an intraocular lens, a contact lens and a corneal implant lens.

28. The ophthalmic lens of claim 24 wherein the near zone is annular, and which further comprises a central zone having a vision correction power greater than the baseline diopter power, the near zone circumscribes the central zone.

29. The ophthalmic lens of claim 24 wherein the near zone and the additional near zone are annular and the additional near zone circumscribes the near zone.

30. An ophthalmic lens having a baseline diopter power for far vision correction, the ophthalmic lens comprising:

a central zone including a center region at a central optical axis of the ophthalmic lens and having a vision correction power, an intermediate region at a radial location outwardly of the center region and having a vision correction power which is the highest vision correction power in the central zone, and an outer region at a radial location outwardly of the intermediate region and having a vision correction power equal to the vision correction power of the center region, provided that the highest vision correction power in the central zone is at a radial location closer to the center region than to the outer region;

a first outer zone located outwardly of the central zone and having a vision correction power less than the baseline diopter power;

a second outer zone located outwardly of the first outer zone and having a vision correction power greater than the baseline diopter power; and

a third outer zone located outwardly of the second outer zone and having a vision correction power greater than the baseline diopter power.

31. The ophthalmic lens of claim 30 wherein the third outer zone includes vision correction powers which diffuse a halo caused by passing light to the third outer zone relative to the halo caused by passing light to a similar third outer zone of a substantially identical lens in which the similar third outer zone has a constant vision correction power throughout.

32. The ophthalmic lens of claim 30 wherein the third outer zone has a radial width which is less than about 40% of the radial width of the second outer zone.

33. The ophthalmic lens of claim 30 wherein the third outer zone includes a central plateau region having an inner end and an outer end and vision correction powers which increase progressively from the inner end to the outer end.

34. The ophthalmic lens of claim 30 which further comprises a fourth outer zone located outwardly of the second outer zone and inwardly of the third outer zone and having vision correction powers less than the baseline diopter power.

35. The ophthalmic lens of claim 34 wherein the fourth outer zone has an inner region having a vision correction power, an intermediate region located outwardly of the inner region and having a vision correction power which is increased relative to the vision correction power of the inner region and is the highest vision correction power in the intermediate region;

and an outermost vision correction power equal to the vision correction power of the inner region, and an outer region located outwardly of the intermediate region and having a vision correction power which is the lowest vision correction power of the fourth outer zone, provided that the highest vision correction power of the fourth outer zone is located closer to the vision correction power of the inner region than to the outermost vision correction power of the intermediate region.

36. The ophthalmic lens of claim 30 wherein the first, second and third outer zones are annular and the first outer zone circumscribes the central zone, the second outer zone circumscribes the first outer zone and the third outer zone circumscribes the second outer zone.

37. The ophthalmic lens of claim 30 which further comprises a fourth outer zone located outwardly of the second outer zone and inwardly of the third outer zone and having vision correction powers less than the baseline diopter power, the fourth outer zone is annular and circumscribes the second outer zone and is circumscribed by the third outer zone.