Aspheric lenses and lens family
View Patent ↗In an embodiment, an aspheric IOL for use in a pseudophakic ocular system has no inherent spherical aberration. An embodiment of the invention is directed to a family of aspheric IOLs in which 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) having substantially no inherent spherical aberration. 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 rage of the A-IOL family.
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, the A-IOL having substantially no inherent spherical aberration, such that the intraocular lens would impart substantially no spherical aberration on a planar wave passing through the intraocular lens.
2. The A-IOL of claim 1 , wherein the anterior lens component has substantially no inherent spherical aberration and the posterior lens component has substantially no inherent spherical aberration.
3. The A-IOL of claim 1 , 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.
4. The A-IOL of claim 1 , wherein the at least one aspheric surface is a rotationally symmetric asphere.
5. The A-IOL of claim 1 , wherein the first surface is the at least one aspheric surface.
6. The A-IOL of claim 1 , wherein the anterior lens component is a biconvex optic.
7. The A-IOL of claim 6 , wherein the posterior lens component includes a plano surface.
8. The A-IOL of claim 7 , wherein the fourth surface is the plano surface.
9. The A-IOL of claim 1 , wherein at least three of the surfaces are aspheres.
10. The A-IOL of claim 9 , wherein the at least three surfaces are rotationally symmetric aspheres.
11. The A-IOL of claim 9 , wherein the fourth surface is spherical.
12. The A-IOL of claim 1 , having an accommodating range between about 1.5 to 4 diopters.
13. The A-IOL of claim 1 , having an optical correcting power in the range between about positive 30 to negative 15 diopters.
14. The A-IOL of claim 13 , wherein the anterior lens component has an optical power in the range of about 20 to 50 diopters.
15. The A-IOL of claim 14 , 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.
16. The A-IOL of claim 14 , wherein the anterior lens component has an optical power of about 33 diopters.
17. The A-IOL of claim 16 , wherein the A-IOL has an accommodating amplitude of about 2.2 diopters per millimeter of anterior element relative translational movement.
18. The A-IOL of claim 13 , wherein the posterior lens component has a negative optical power.
19. 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 AIOL has substantially no inherent spherical aberration, such that each member lens would impart substantially no spherical aberration on a planar wave passing therethrough.
20. The A-IOL family of claim 19 , wherein the at least one aspheric surface is a rotationally symmetric asphere.
21. The A-IOL family of claim 19 , 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.
22. The A-IOL family of claim 19 , 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.
23. The A-IOL family of claim 19 , 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.
24. The A-IOL family of claim 23 , 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.
25. The A-IOL family of claim 23 , wherein at least three of the surfaces are rotationally symmetric aspheric surfaces.
26. The A-IOL family of claim 19 , 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.
27. The A-IOL family of claim 26 , wherein the physical lens parameter is an edge thickness value of at least one of the lens components.
28. The A-IOL family of claim 26 , wherein the physical lens parameter is a lens volume value of at least one of the lens components.
29. The A-IOL family of claim 26 , wherein the physical lens parameter is a lens cross sectional area value of at least one of the lens components.
30. The A-IOL family of claim 26 , wherein the physical lens parameter is a shape value of at least one of the lens components.
31. The A-IOL family of claim 26 , wherein the physical lens parameter is a size value of at least one of the lens components.
32. The A-IOL family of claim 19 , having a power range from positive 30 diopters to negative 15 diopters.