Intraocular lens
The present invention relates to an intraocular lens comprising: a primary lens ( 1000 ) having a first focal length, a first surface, and a second surface; a secondary lens ( 2000 ) having at least two focal lengths, a first surface ( 2100 ), and a second surface ( 2200 ), wherein the second surface ( 2200 ) of the secondary lens ( 2000 ) conforms to the first surface of the primary lens ( 1000 ), while the secondary lens ( 2000 ) is attached to the primary lens ( 1000 ) by peelable adhesive forces over substantially its second surface ( 2200 ).
1. An intraocular lens surgically implantable in the capsular bag, sulcus, or in the anterior chamber of the eye, the intraocular lens comprising:
a primary lens having a first focal length, a first surface, and a second surface, the primary lens having one or more haptic portions for positioning the primary lens in the eye during implantation; and
a secondary lens having a first surface and a second surface, wherein the second surface of the secondary lens conforms to the first surface of the primary lens, while the secondary lens is attached to the primary lens by peelable adhesive forces allowing peeling of the lenses by adhesive rupture on the second surface of the secondary lens, wherein a chemical composition of the primary lens and a chemical composition of the secondary lens are effective to result in a reversible interfacial interaction between the second surface of the secondary lens and the first surface of the primary lens, which includes an optical portion of the primary lens, and allowing removal of the secondary lens while the primary lens remains implanted in the eye without degrading the optical characteristics of the optical portion of the primary lens.
2. The intraocular lens according to claim 1 wherein the secondary lens has at least two focal lengths.
3. The intraocular lens according to claim 1 , wherein the secondary lens has a diameter smaller than the diameter of an optical portion of the primary lens.
4. The intraocular lens according to claim 1 , wherein the secondary lens has a diameter less than or equal to 5.00 mm.
5. The intraocular lens according to claim 1 , wherein the secondary lens has a diameter smaller than the diameter of a rhexis of a capsular bag.
6. The intraocular lens according to claim 1 , wherein the primary lens is a refractive lens.
7. The intraocular lens according to claim 6 , wherein the refractive lens provides a clear view over a long distance.
8. The intraocular lens according to claim 7 , wherein the refractive lens allows correction of corneal astigmatism.
9. The intraocular lens according to claim 1 , wherein the secondary lens is a diffractive lens having an order x with an infinite focal length and at least one order x+1 having a finite focal length.
10. The intraocular lens according to claim 1 , wherein the secondary lens is in the form of a thin meniscus having a central thickness of less than 500 μm.
11. The intraocular lens according to claim 10 , wherein the thin meniscus has a central thickness of less than 200 μm.
12. The intraocular lens according to claim 1 , wherein the combination of the primary lens and the secondary lens forms a multifocal lens whose optical characteristics make it possible to obtain a sharp image at great distances superimposed on a sharp image at short distance.
13. The intraocular lens according to claim 12 , wherein the combination of the primary lens and the secondary lens further provides an additional focal distance that makes it possible to obtain a net image at intermediate distance.
14. The intraocular lens according to claim 1 , wherein materials forming the primary lens and the secondary lens exhibit intrinsic adhesion that is sufficient to maintain the integrity of the primary lens and the secondary lens in an aqueous medium.
15. The intraocular lens according to claim 1 , wherein materials forming the primary lens and the secondary lens comprise at least one copolymer, wherein the copolymer comprised in the primary lens comprises a monomer common with the copolymer comprised in the secondary lens.
16. The intraocular lens according to claim 15 , wherein the common monomer is an acrylate.
17. The intraocular lens of claim 16 , wherein the acrylate comprises one or more of 2-hydroxyethylmethylacrylate, methylmethacrylate, ethylmethylacrylate, hydroxyhexylmethacrylate, ethoxyethylmethacrylate, 2-phenylethylacrylate, ethylacrylate; 2-phenylethylmethacrylate, 2,2,2-trifluoroethylmethacrylate, ethylene-glycolphenyletheracrylate, butylacrylate, dimethyldiphenylsiloxane, dimethylsiloxane, and combinations thereof.
18. The intraocular lens according to claim 1 , comprising centering means of the secondary lens on the primary lens.
19. The intraocular lens according to claim 18 , wherein the centering means comprise an open recess in the primary lens to accommodate the secondary lens.
20. The intraocular lens according to claim 19 , wherein the recess has a height equal to the height of the secondary lens.