Methods of obtaining ophthalmic lenses providing the eye with reduced aberrations
An intraocular correction lens has at least one aspheric surface which when its aberrations are expressed as a linear combination of polynomial terms, is capable of, in combination with a lens in the capsular bag of an eye, reducing similar such aberration terms obtained in a wavefront having passed the cornea, thereby obtaining an eye sufficiently free from aberrations.
1. An intraocular correction lens having at least one aspheric surface designed such that its aberrations are expressed as a linear combination of polynomial terms, and in combination with a lens in the capsular bag of an eye reduces similar such aberration terms obtained in a wavefront having passed the cornea, thereby obtaining an eye sufficiently free from aberrations.
2. An intraocular correction lens according to claim 1 , wherein said aspheric surface is the anterior surface of the lens.
3. An intraocular correction lens according to claim 1 , wherein said aspheric surface is the posterior surface of the lens.
4. An intraocular correction lens according to claim 3 , wherein said polynomial terms are Zernike polynomials.
5. An intraocular correction lens according to claim 4 capable of reducing polynomial terms representing spherical aberrations and astigmatism.
6. A lens according to claim 5 , capable of reducing the 11th Zemike polynomial term of the 4th order.
7. An intraocular correction lens according to claim 6 made from a soft biocompatible material.
8. An intraocular correction lens according to claim 7 made of silicone.
9. An intraocular correction lens according to claim 7 made of hydrogel.
10. An intraocular correction lens according to claim 6 made of a rigid biocompatible material.
11. An intraocular correction lens according to claim 1 adapted to be implanted in the posterior chamber bag comprising a centrally located optical part capable of providing an optical correction and a peripherally located supporting element capable of maintaining said optical part in said central location, said optical part and said support element together having a concave posterior surface which is part of a non-spherical surface, the intersection between said non-spherical surface and any plane containing the optical axis representing a flawless curve free from discontinuities and points of inflection.
12. An intraocular correction lens according to claim 11 adapted to be implanted in the anterior chamber of the eye and fixated to iris.
13. A method for improving the visual quality of an eye, comprising implanting an intraocular correction lens according to claim 1 .
14. A method according to claim 13 , wherein spectacles or correction lenses are provided outside the eye to further improve the visual quality.
15. A method according to claim 13 , wherein the cornea of the patient receiving the intraocular correction lens has been modified by means of a laser.
16. A method according to claim 13 , wherein the intraocular correction lens is implanted in the anterior chamber of the eye and fixated to iris.
17. An intraocular correction lens according to claim 11 made from a soft biocompatible material.
18. An intraocular correction lens according to claim 17 made of silicone or hydrogel.
19. An intraocular correction lens according to claim 11 made of a rigid biocompatible material.
20. An intraocular correction lens according to claim 11 made of acrylate material.
21. An intraocular correction lens according to claim 1 made of acrylate material.