Multifocal ophthalmic lenses

• US 6,986,578 B2
• Filed: 01/30/2003
• Issued: 01/17/2006
• Est. Priority Date: 01/30/2003
• Status: Active Grant

• Current Assignee: Johnson & Johnson Vision Care Incorporated (Johnson & Johnson)
• Original Assignee: Johnson & Johnson Vision Care Incorporated (Johnson & Johnson)
• Inventors: Jones, Larry G.
• Primary Examiner(s): SCHWARTZ, JORDAN MARC
• Application Number:
  US10/354,401
• Publication Number:
  US 20040150789A1
• Time in Patent Office: 1,083 Days
• Field of Search: 351/161, 351/164, 351/168, 351170-172, 623 627- 629, 623/6.24, 623/6.3
• US Class Current: 351/161
• CPC Class Codes: G02C 2202/22 Correction of higher order and chromatic aberrations, wave front measurement and calculation
• CPC Class Codes: G02C 7/041 bifocal; multifocal
• CPC Class Codes: G02C 7/042 Simultaneous type
• CPC Class Codes: G02C 7/045 Sectorial configuration
• CPC Class Codes: G02C 7/048 Means for stabilising the orientation of lenses in the eye

Abstract

The invention provides lenses for correcting presbyopia in which the near vision segments interfere at least about 50% less with distance vision than do the near vision segments in conventional contact lenses.

Claims

1. A contact lens, comprising an optic zone having a central distance optical area circumscribed by a plurality of distance optical power segments alternating with a plurality of near optical power segments and intermediate power segments, wherein the intermediate power segments and the near optical power segments are asymmetrical.

2. The contact lens of claim 1, wherein the optical power segments are radial segments.

3. The contact lens of claim 2, wherein the radial segments are substantially triangular.

4. The contact lens of claim 1, wherein the plurality of distance and near optical segments further comprises a number of near optical power segments that is substantially equal to the number of distance optical power segments.

5. The contact lens of claim 1, wherein the plurality of distance and near optical segments further comprises a number of near optical power segments that is less than the number of distance optical power segments.

6. The contact lens of claim 1, wherein the distance and near optical power segments are on a first surface of the lens and a second surface of the lens farther comprises correction for a lens wearer'"'"'s high order aberrations.

7. The contact lens of claim 1, wherein the distance and near optical power segments are on a first surface of the lens and a second surface of the lens further comprises a topography that inversely correspond to a lens wearer'"'"'s corneal topography.

8. The contact lens of claim 1, further comprising cylinder power.

9. A contact lens, comprising an optic zone having a plurality of distance optical power segments alternating with a plurality of near optical power segments, wherein the plurality of distance and near optical power segments are concentric arcs and are asymmetrical along the vertical axis of the lens.

10. The contact lens of claim 9, wherein the optic zone further comprises intermediate power segments.

11. The contact lens of claim 9, wherein the plurality of distance and near optical segments further comprises a number of near optical power segments that is substantially equal to the number of distance optical power segments.

12. The contact lens of claim 9, wherein the plurality of distance and near optical segments further comprises a number of near optical power segments that is less than the number of distance optical power segments.

13. The contact lens of claim 9, wherein the distance and near optical power segments are on a first surface of the lens and a second surface of the lens further comprises correction for a lens wearer'"'"'s high order aberrations.

14. The contact lens of claim 9, wherein the distance and near optical power segments are on a first surface of the lens and a second surface of the lens further comprises a topography that inversely correspond to a lens wearer'"'"'s corneal topography.

15. The contact lens of claim 9, further comprising cylinder power.

16. A contact lens, comprising an optic zone having a central near optical area circumscribed by a plurality of distance optical power segments alternating with a plurality of near optical power segments and intermediate power segments, wherein the intermediate power segments and near optical power segments are asymmetrical.

17. The contact lens of claim 16, wherein the optical power segments are radial segments.

18. The contact lens of claim 17, wherein the radial segments are substantially triangular.

19. The contact lens of claim 16, further comprising the number of near optical power segments that is substantially equal to the number of distance optical power segments.

20. The contact lens of claim 16, further comprising the number of near optical power segments that is less than the number of distance optical power segments.

21. The contact lens of claim 16, wherein the distance and near optical power segments are on a first surface of the lens and a second surface of the lens further comprises correction for a lens wearer'"'"'s high order aberrations.

22. The contact lens of claim 16, wherein the distance and near optical power segments are on a first surface of the lens and a second surface of the lens further comprises a topography that inversely correspond to a lens wearer'"'"'s corneal topography.

23. The contact lens of claim 16, further comprising cylinder power.