Lenses capable of post-fabrication power modification
The present invention relates to lenses that are capable of post-fabrication power modifications. In general, the inventive lenses comprise (i) a first polymer matrix and (ii) a refraction modulating composition that is capable of stimulus-induced polymerization dispersed therein. When at least a portion of the lens is exposed to an appropriate stimulus, the refraction modulating composition forms a second polymer matrix. The amount and location of the second polymer matrix may modify a lens characteristic such as lens power by changing its refractive index and/or by altering its shape. The inventive lenses have a number of applications in the electronics and medical fields as data storage means and as medical lenses, particularly intraocular lenses, respectively.
1. A method for fabricating an optical element, comprising:
mixing a first polymer matrix composition with a refraction modulating composition to form a reaction mixture, wherein the refraction modulating composition further comprises a siloxane moiety;
placing the reaction mixture into a mold;
polymerizing the first polymer matrix composition to form a first polymer matrix with the refraction modulating composition dispersed therein; and,
removing said optical element from the mold.
2. A method for making an optical element comprising:
(a) preparing a mixture of a first polymer matrix composition, and a refraction modulating composition, wherein the refraction modulating composition further comprises a siloxane moiety;
(b) polymerizing said first polymer matrix composition to form a first polymer matrix having the refraction modulating composition dispersed throughout the first polymer matrix.
3. The method of claim 2 wherein said first polymer matrix composition comprises monomer selected from the group consisting of acrylates, methacrylates, phosphazenes, siloxanes and vinyls.
4. The method of claim 2 wherein said refraction modulating composition is photopolymerizable.
5. The method of claim 2 wherein the future mixture comprising a photoinitiator.
6. The method of claim 2 further comprising the step of placing the mixture of step (a) into a mold before the polymerization step (b).
7. The method of claim 2 further comprising the step of placing the mixture of step (a) into a mold before the polymerization step (b).
8. The method of claim 2 wherein said refraction modulation composition has the formula
X—Y—X 1
wherein X and X 1 independently comprise a terminal siloxane moiety with a group capable of stimulus induced polymerization and Y is a siloxane moiety having the formula:
wherein m and n are integers and R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrogen, alkyl, aryl and heteroaryl.
9. The method of claim 2 wherein said optical element is an intraocular lens.
10. The method of claim 2 wherein said optical element is a contact lens.
11. The method of claim 2 wherein said optical element is a prism.
12. The method of claim 2 wherein said optical element is a data storage device.
13. The method of claim 2 further comprising the step of exposing the optical element to an external stimulus to cause a change in the optical element.
14. The method of claim 13 wherein said external stimulus is electromagnetic radiation.
15. The method of claim 14 wherein the light induces the polymerization of the refraction modulating composition thereby causing the change in the optical element.
16. The method of claim 15 wherein the change is a change in the shape of the optical element.
17. The method of claim 15 wherein the change is a change in the refractive index of the optical element.
18. The method of claim 15 wherein the change is a change in both the shape and refractive index of the optical element.
19. The method of claim 13 wherein said change is a change in the shape of the optical element.
20. The method of claim 13 wherein said change is a change in the refractive index of the optical element.
21. The method of claim 13 wherein the change is a change in both the shape and refractive index of the optical element.
22. The method of claim 2 wherein said refraction modulation composition has the formula
X—Y—X 1
wherein X and X 1 independently comprise a terminal siloxane moiety with a group capable of stimulus induced polymerization and Y is a siloxane moiety having the formula:
wherein m and n are integers and R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrogen, alkyl, aryl and heteroaryl.
23. The method of claim 22 wherein X and X 1 have the formula
wherein R 5 and R 6 are independently selected from the group consisting of hydrogen, alkyl, aryl and hetero alkyl and Z contains a photopolymerizable group.
24. The method of claim 23 wherein R 1 , R 2 , R 3 , R 5 and R 6 are alkyls and R 4 is aryl.
25. The method of claim 23 wherein R 1 , R 2 , R 3 , R 5 and R 6 are alkyls and R 3 and R 4 are aryl.
26. A method for fabricating optical element comprising
(a) preparing a mixture of first polymer matrix composition and refraction modulating composition, wherein the refraction modulating composition further comprises a siloxane moiety;
(b) polymerizing the first polymer matrix composition to form a first polymer matrix;
(c) polymerizing the refraction modulating composition to form a second polymer matrix within at least a portion of said optical element, wherein the remaining unpolymerized refraction modulating composition is freely diffusible in the first polymer matrix and the second polymer matrix;
(d) locking-in the remaining unpolymerized refraction modulating composition.
27. The method of claim 26 wherein the polymerization of the refraction modulating composition causes changes in the refractive properties of the optical element.
28. The method of claim 26 wherein the polymerization of said refractive modulating composition causes a change in the shape of the optical element.
29. The method of claim 26 wherein the polymerization of the refraction modulating composition is photopolymerization.
30. The method of claim 26 wherein the polymerization of the first polymer matrix composition is performed in vitro.
31. The method of claim 26 wherein said mixture further comprises a photoinitiator.
32. The method of claim 26 wherein the polymerization of the refraction modulating composition is performed in vivo.
33. The method of claim 26 wherein said optical element is an intraocular lens.
34. The method of claim 26 wherein said optical element is a contact lens.
35. The method of claim 26 wherein said optical element is a prism.
36. The method of claim 26 wherein said optical element is a data storage device.