Aspheric lenses and lens family

• US 20060030938A1
• Filed: 10/12/2005
• Published: 02/09/2006
• Est. Priority Date: 03/31/2003
• Status: Active Grant

• Current Assignee: Bausch & Lomb Incorporated (Bausch Health Cos., Inc.)
• Original Assignee: Bausch & Lomb Incorporated (Bausch Health Cos., Inc.)
• Inventors: Altmann, Griffith E.
• Granted Patent: US 7,905,917 B2
• Time in Patent Office: Days
• US Class Current: 623/6.370
• CPC Class Codes: A61F 2/1602 Corrective lenses for use in addition to the natural lenses of the eyes or for pseudo-phakic eyes
• 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 2/1629 for changing longitudinal position, i.e. along the visual axis when implanted
• 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 2/1648 Multipart lenses
• CPC Class Codes: A61F 2/1656 Fresnel lenses, prisms or plates
• CPC Class Codes: A61F 2250/0053 differing in optical properties

Abstract

In an embodiment, an aspheric IOL for use in a pseudophakic ocular system has no inherent spherical aberration. In an embodiment, an aspheric IOL for use in a pseudophakic ocular system has a controlled amount of inherent negative spherical aberration such that the IOL induces no spherical aberration in a converging wavefront from a cornea passing through the lens. The amount of negative spherical aberration is less than an amount necessary to counter balance the positive spherical aberration of the cornea. In an aspect, the amount of inherent negative spherical aberration mimics that of a healthy natural crystalline lens in a relaxed state. An embodiment of the invention is directed to a family of aspheric IOLs made up of any two or more member aspheric IOLs each having different spherical aberration values and different lens shape factors. A lens constant, such as the well known A-constant, is kept constant throughout the family of lenses. An embodiment of the invention is directed to a multi-component accommodating intraocular lens (A-IOL). In a particular embodiment, the A-IOL introduces substantially no residual spherical aberration to a wavefront incident upon and passing through the A-IOL. According to an aspect, the A-IOL will have substantially no inherent spherical aberration. In an aspect, the posterior lens component of the A-IOL may have a diffractive or Fresnel optical surface to control a physical characteristic of the A-IOL. An embodiment of the invention is directed to a family of member A-IOLs where each member A-IOL has a first (1) surface and a fourth (4) surface characterized by a radius and a conic constant that remain substantially constant over the power range of the A-IOL family. An embodiment of the invention is directed to a family of member A-IOLs in which the accommodative amplitude per millimeter of anterior lens translational movement varies with A-IOL power over the power range of the family.

Claims

1. A multi-component accommodating intraocular lens (A-IOL), comprising:

an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface;

at least one biasing element operably coupling the anterior lens component and the posterior lens component,

wherein at least one of the surfaces is aspheric such that the A-IOL introduces substantially no residual spherical aberration to a wavefront passing through said A-IOL.

2. The A-IOL of claim 1, having substantially no inherent spherical aberration.

3. The A-IOL of claim 2, wherein the anterior lens component has substantially no inherent spherical aberration and the posterior lens component has substantially no inherent spherical aberration.

4. The A-IOL of claim 2, wherein the anterior lens component has a finite amount of inherent spherical aberration, SA_A, and the posterior lens component has an equal amount of inherent spherical aberration, SA_P, of opposite sign to that of the anterior lens component.

5. The A-IOL of claim 1, wherein the at least one aspheric surface is a rotationally symmetric asphere.

6. The A-IOL of claim 1, wherein the first surface is the at least one aspheric surface.

7. The A-IOL of claim 1, wherein the anterior lens component is a biconvex optic.

8. The A-IOL of claim 7, wherein the posterior lens component includes a plano surface.

9. The A-IOL of claim 8, wherein the fourth surface is the piano surface.

10. The A-IOL of claim 1, wherein at least three of the surfaces are aspheres.

11. The A-IOL of claim 10, wherein the at least three surfaces are rotationally symmetric aspheres.

12. The A-IOL of claim 10, wherein the fourth surface is spherical.

13. The A-IOL of claim 1, having an accommodating range between about 1.5 to 4 diopters.

14. The A-IOL of claim 1, having an optical correcting power in the range between about positive 30 to negative 15 diopters.

15. The A-IOL of claim 1, wherein the posterior lens component has a discontinuous type optical surface.

16. The A-IOL of claim 15, wherein the third surface is the discontinuous type optical surface.

17. The A-IOL of claim 15, wherein the discontinuous type optical surface is one of a diffractive surface, a Fresnel surface and a holographic surface.

18. The A-IOL of claim 14, wherein the anterior lens component has an optical power in the range of about 20 to 50 diopters.

19. The A-IOL of claim 18, wherein the A-IOL has an accommodating amplitude between about 2.0 diopters per millimeter and 3.5 diopters per millimeter of anterior element relative translational movement.

20. The A-IOL of claim 18, wherein the anterior lens component has an optical power of about 33 diopters.

21. The A-IOL of claim 20, wherein the A-IOL has an accommodating amplitude of about 2.2 diopters per millimeter of anterior element relative translational movement.

22. The A-IOL of claim 14, wherein the posterior lens component has a negative optical power.

23. A family of multi-component accommodating intraocular lenses (A-IOLs), comprising:

a plurality of member A-IOLs each having a different optical power, wherein at least one surface of each member A-IOL of the family is aspheric such that each member A-IOL introduces substantially no residual spherical aberration to a wavefront passing through said member A-IOL.

24. The A-IOL family of claim 23, wherein the at least one aspheric surface is a rotationally symmetric asphere.

25. The A-IOL family of claim 23, wherein each member A-IOL has substantially no inherent spherical aberration.

26. The A-IOL family of claim 25, wherein each member A-IOL includes an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface; and

a biasing element operably coupling the anterior lens component and the posterior lens component, wherein the anterior lens component has substantially no inherent spherical aberration and the posterior lens component has substantially no inherent spherical aberration.

27. The A-IOL family of claim 25, wherein each member A-IOL includes an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface; and

a biasing element operably coupling the anterior lens component and the posterior lens component, wherein the anterior lens component has a finite amount of inherent spherical aberration, SA_A, and the posterior lens component has an equal amount of inherent spherical aberration, SA_P, of opposite sign to that of the anterior lens component.

28. The A-IOL family of claim 23, wherein each member A-IOL includes an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface; and

a biasing element operably coupling the anterior lens component and the posterior lens component,

further wherein the first surface and the fourth surface each have respective radius values that remain substantially constant over the power range in the family.

29. The A-IOL family of claim 28, wherein the first surface and the fourth surface each have respective conic constant values that remain substantially constant over the power range in the family.

30. The A-IOL family of claim 28, wherein at least three of the surfaces are rotationally symmetric aspheric surfaces.

31. The A-IOL family of claim 23, wherein each member A-IOL includes an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface; and

a biasing element operably coupling the anterior lens component and the posterior lens component,

wherein a physical lens parameter of the member A-IOLs is approximately constant over the power range.

32. The A-IOL family of claim 31, wherein the physical lens parameter is an edge thickness value of at least one of the lens components.

33. The A-IOL family of claim 31, wherein the physical lens parameter is a lens volume value of at least one of the lens components.

34. The A-IOL family of claim 31, wherein the physical lens parameter is a lens cross sectional area value of at least one of the lens components.

35. The A-IOL family of claim 31, wherein the physical lens parameter is a shape value of at least one of the lens components.

36. The A-IOL family of claim 31, wherein the physical lens parameter is a size value of at least one of the lens components.

37. The A-IOL family of claim 31, wherein the posterior lens component of at least some of the member A-IOLs have a discontinuous type optical surface.

38. The A-IOL family of claim 37, wherein the discontinuous type surface is one of a diffractive surface, a Fresnel surface and a holographic surface.

39. The A-IOL family of claim 23, having a power range from positive 30 diopters to negative 15 diopters.

40. A multi-component accommodating intraocular lens (A-IOL), comprising:

an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface;

at least one biasing element operably coupling the anterior lens component and the posterior lens component,

wherein the A-IOL has a finite amount of inherent negative spherical aberration.

41. The A-IOL of claim 40, wherein the finite amount of inherent negative spherical aberration is less than an amount of inherent positive corneal spherical aberration.

42. The A-IOL of claim 41, wherein the amount of inherent corneal spherical aberration is an average value for a statistically significant population of subjects.

43. The A-IOL of claim 40, wherein the finite amount of inherent negative spherical aberration is substantially the same as an amount of spherical aberration in a healthy crystalline lens in a relaxed state.

44. The A-IOL of claim 43, wherein the finite amount of inherent negative spherical aberration is in the range between about (−

)0.13 micron to negative (−

)0.07 micron.

45. The A-IOL of claim 44, wherein the finite amount of inherent negative spherical aberration is about (−

)0.1 micron.

46. The A-IOL of claim 40, wherein one of the anterior and the posterior lens components has at least one aspheric surface such that the one lens component imparts substantially no spherical aberration to a wavefront propagating through the one lens component, and wherein the other lens component has the finite amount of inherent negative spherical aberration.

47. The A-IOL of claim 40, wherein the one lens component is the anterior lens component.

48. The A-IOL of claim 40, having an accommodating range between about 1.5 to 4 diopters.

49. The A-IOL of claim 40, having an optical correcting power in the range between about positive 30 to negative 15 diopters.

50. The A-IOL of claim 40, wherein the posterior lens component has a discontinuous type optical surface.

51. The A-IOL of claim 50, wherein the third surface is the discontinuous type optical surface.

52. The A-IOL of claim 50, wherein the discontinuous type optical surface is one of a diffractive surface, a Fresnel surface and a holographic surface.

53. The A-IOL of claim 48, wherein the anterior lens component has an optical power in the range of about 20 to 50 diopters.

54. The A-IOL of claim 53, wherein the A-IOL has an accommodating amplitude between about 2.0 diopters per millimeter and 3.5 diopters per millimeter of anterior element relative translational movement.

55. The A-IOL of claim 48, wherein the anterior lens component has an optical power of about 33 diopters.

56. The A-IOL of claim 55, wherein the A-IOL has an accommodating amplitude of about 2.2 diopters per millimeter of anterior element relative translational movement.

57. A family of multi-component accommodating intraocular lenses (A-IOLs), comprising:

a plurality of member A-IOLs each having a different optical power, wherein each member A-IOL has a finite amount of inherent negative spherical aberration.

58. The A-IOL family of claim 57, wherein the finite amount of inherent negative spherical aberration is less than an amount of inherent positive corneal spherical aberration.

59. The A-IOL family of claim 58, wherein the amount of inherent positive corneal spherical aberration is an average value for a statistically significant population of subjects.

60. The A-IOL family of claim 57, wherein the finite amount of inherent negative spherical aberration is substantially the same as an amount of spherical aberration in a healthy crystalline lens in a relaxed state.

61. The A-IOL family of claim 57, wherein each member A-IOL includes an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface; and

a biasing element operably coupling the anterior lens component and the posterior lens component,

further wherein one of the anterior and the posterior lens components has at least one aspheric surface such that the one lens component imparts substantially no spherical aberration to a wavefront propagating through the one lens component, and wherein the other lens component has the finite amount of inherent negative spherical aberration.

62. The A-IOL family of claim 57, having a power range from positive 30 diopters to negative 15 diopters.

63. The A-IOL family of claim 57, wherein each member A-IOL includes an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface; and

a biasing element operably coupling the anterior lens component and the posterior lens component,

further wherein the first surface and the fourth surface each have respective radius values that remain substantially constant over the power range in the family.

64. The A-IOL family of claim 63, wherein the first surface and the fourth surface each have respective conic constant values that remain substantially constant over the power range in the family.

65. The A-IOL family of claim 57, wherein each member A-IOL includes an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface; and

a biasing element operably coupling the anterior lens component and the posterior lens component,

wherein a physical lens parameter of the member A-IOLs is approximately constant over the power range.

66. The A-IOL family of claim 65, wherein the physical lens parameter is an edge thickness value of at least one of the lens components.

67. The A-IOL family of claim 65, wherein the physical lens parameter is a lens volume value of at least one of the lens components.

68. The A-IOL family of claim 65, wherein the physical lens parameter is a lens cross sectional area value of at least one of the lens components.

69. The A-IOL family of claim 65, wherein the physical lens parameter is a shape value of at least one of the lens components.

70. The A-IOL family of claim 65, wherein the physical lens parameter is a size value of at least one of the lens components.

71. The A-IOL family of claim 65, wherein the posterior lens component of at least some of the member A-IOLs has a discontinuous type optical surface.

72. The A-IOL family of claim 65, wherein the discontinuous type optical surface is one of a diffractive surface, a Fresnel surface and a holographic surface.

73. A multi-component accommodating intraocular lens (A-IOL), comprising:

an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface;

at least one biasing element operably coupling the anterior lens component and the posterior lens component,

wherein the posterior lens component has a discontinuous type optical surface.

74. The A-IOL of claim 73, wherein the third surface is the discontinuous type optical surface.

75. The A-IOL of claim 73, wherein the discontinuous type optical surface is one of a diffractive surface, a Fresnel surface and a holographic surface.

76. A family of multi-component accommodating intraocular lenses (A-IOLs), comprising a plurality of member A-IOLs each having a different optical power, wherein each member A-IOL includes an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface; and

a biasing element operably coupling the anterior lens component and the posterior lens component, further wherein the first surface and the fourth surface each have respective radius values that remain substantially constant over a power range of the family.

77. The A-IOL family of claim 76, wherein the first surface and the fourth surface each have respective conic constant values that remain substantially constant over the power range of the family.

78. A family of multi-component accommodating intraocular lenses (A-IOLs), comprising a plurality of member A-IOLs each having a different optical power, wherein each member A-IOL includes an anterior lens component having a first, anterior surface and a second, posterior surface;

a posterior lens component having a third, anterior surface and a fourth, posterior surface; and

a biasing element operably coupling the anterior lens component and the posterior lens component, further wherein a physical lens parameter of the member A-IOLs is approximately constant over a power range of the family.