Vision enhancing ophthalmic devices and related methods and compositions

• US 20060134170A1
• Filed: 08/12/2005
• Published: 06/22/2006
• Est. Priority Date: 08/13/2004
• Status: Abandoned Application

• Current Assignee: Forsight Labs, LLC, National Research Council Canada, University of Ottawa
• Original Assignee: Forsight Labs, LLC
• Inventors: Liu, Yuwen, Li, Fengfu, Carlsson, David J., Griffith, May, Asmanrafat, Mehrdad, Marmo, J.Christopher
• Application Number:
  US11/203,685
• Publication Number:
  US 20060134170A1
• Time in Patent Office: Days
• US Class Current: 424/427
• CPC Class Codes: A61F 9/0017 implantable in, or in contact with, the eye, e.g. ocular inserts
• CPC Class Codes: A61K 38/39 Connective tissue peptides, e.g. collagen, elastin, laminin, fibronectin, vitronectin, cold insoluble globulin [CIG]
• CPC Class Codes: A61L 2430/16 for reconstruction of eye parts, e.g. intraocular lens, cornea
• CPC Class Codes: A61L 27/20 Polysaccharides
• CPC Class Codes: A61L 27/24 Collagen
• CPC Class Codes: A61L 27/52 Hydrogels or hydrocolloids
• CPC Class Codes: A61P 27/02 Ophthalmic agents

Abstract

Devices, methods, and compositions for improving vision or treating diseases, disorders or injury of the eye are described. Ophthalmic devices, such as corneal onlays, corneal inlays, and full-thickness corneal implants, are made of a material that is effective in facilitating nerve growth through or over the device. The material may include an amount of collagen greater than 1% (w/w), such as between about 10% (w/w) and about 30% (w/w). The material may include collagen polymers and/or a second biopolymer or water-soluble synthetic polymer cross-linked using EDC/NHS chemistry. The material may additionally comprise a synthetic polymer. The devices are placed into an eye to correct or improve the vision of an individual or to treat a disease, disorder or injury of an eye of an individual.

Claims

1. A vision enhancing ophthalmic device, comprising a body including a material in an amount effective in facilitating nerve growth through or over the body when the device is placed in an eye of an individual, the body being formed to have an optical power.

2. The device of claim 1, wherein the material comprises an amount of collagen between about 1% (w/w) and about 50% (w/w).

3. The device of claim 2, wherein the material comprises an amount of collagen between about 10% (w/w) and about 30% (w/w).

4. The device of claim 1, wherein the material comprises cross-linked collagen polymers.

5. The device of claim 1, wherein the material comprises recombinant collagen.

6. The device of claim 1, wherein the body is structured as a corneal onlay, a corneal inlay, or a full-thickness corneal implant.

7. The device of claim 1, wherein the material further comprises a cell growth enhancer agent.

8. The device of claim 7, wherein the cell growth enhancer agent is a peptide.

9. A vision enhancing ophthalmic device comprising a collagen component having an amount of collagen between about 1% (w/w) and about 50% (w/w) and formed to have an optical power.

10. The device of claim 9, wherein the amount of collagen is between about 10% (w/w) and about 30% (w/w).

11. The device of claim 9, wherein the collagen component is formed as a device selected from the group consisting of a corneal inlay configured to be placed in the stroma of a cornea of an individual, a full-thickness corneal implant configured to replace a portion of a cornea of an individual, and a corneal onlay configured to be placed between an epithelial cell layer and Bowman'"'"'s membrane of an individual.

12. The device of claim 9, wherein the collagen is the sole water-swellable polymer of the device.

13. The device of claim 9, wherein the device is optically clear.

14. The device of claim 9, wherein the collagen component comprises collagen which was processed at an acidic pH.

15. The device of claim 14, wherein the acidic pH is between about 5.0 and about 5.5.

16. The device of claim 9, wherein the collagen component is formed to have an anterior surface and a posterior surface.

17. The device of claim 16, wherein the collagen component is formed as a corneal onlay, and the collagen component includes a surface selected from the group consisting of a surface having no surface modification, a posterior surface having a posterior surface modification effective in reducing epithelial cell growth under the onlay when the onlay is placed in an eye of an individual, and an anterior surface having an anterior surface modification effective in promoting epithelial cell growth over the anterior surface of the onlay when the onlay is placed in an eye of an individual.

18. The device of claim 16, wherein the collagen component is formed as a full-thickness corneal implant, and the collagen component includes a surface selected from the group consisting of a posterior surface having a posterior surface modification effective in reducing endothelial cell growth over the posterior surface of the implant when the implant is placed in an eye of an individual, and an anterior surface including no anterior surface modification.

19. The device of claim 16, wherein at least one of the anterior surface and the posterior surface comprise a plasma polymerized fluorinated monomer film.

20. The device of claim 19, wherein the plasma polymerized fluorinated monomer film comprises CF₄ or C₃F₈.

21. The device of claim 16, wherein at least one of the anterior surface and the posterior surface have a low free surface energy effective in reducing cell adhesion thereto.

22. The device of claim 16, wherein at least one of the anterior surface and the posterior surface is sufficiently hydrophilic to reduce cell adhesion thereto.

23. The device of claim 22, wherein at least one of the anterior surface and the posterior surface comprises an alginate coating.

24. The device of claim 9, wherein the collagen component comprises cross-linked collagen polymers.

25. The device of claim 24, wherein the collagen component comprises a collagen selected from the group consisting of recombinant collagen, atelocollagen, type I and type III collagen.

26. The device of claim 24, wherein the collagen component comprises recombinant collagen.

27. The device of claim 24, wherein the collagen component is produced by a process of cross-linking the collagen polymers using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide.

28. The device of claim 24, wherein the collagen component further comprises an agent selected from the group consisting of poly(N-isopropylacrylamide-co-acrylic acid), chondroitin sulfate, chitosan, N,O-carboxymethylchitosan, hyaluronic acid, hyaluronic acid aldehyde, and alginate.

29. The device of claim 24, wherein the collagen component is produced by a process of cross-linking the collagen polymers using a cross-linker other than glutaraldehyde.

30. The device of claim 9 having a refractive index between about 1.34 and about 1.37.

31. The device of claim 9, further comprising a cell growth enhancer agent.

32. The device of claim 31, wherein the cell growth enhancer agent comprises a peptide.

33. The device of claim 32, wherein the peptide has an amino acid sequence of RGD, YIGSR, or IKVAV.

34. The device of claim 9 which is effective in facilitating nerve in-growth into the device.

35. The device of claim 31, wherein the cell growth enhancer agent is selected from the group consisting of neurotrophic factors, nerve growth factors, and epidermal growth factors.

36. The device of claim 31, wherein the cell growth enhancer agent is provided substantially throughout the device.

37. A method of making a vision enhancing ophthalmic device, comprising

combining collagen polymers with a cross-linker agent at an acidic pH;

and

forming the combination into a vision enhancing ophthalmic device having an optical power and being effective in facilitating nerve growth through or over the device.

38. The method of claim 37, wherein the combining step comprises mixing the collagen polymers and the cross-linker agent in a system configured to produce high shear forces on the composition.

39. The method of claim 37, wherein the combining occurs at a temperature between about 0°

C. and about 5°

C.

40. The method of claim 37, wherein the collagen polymers are obtained from the same collagen source.

41. The method of claim 37, wherein the collagen polymers comprise recombinant collagen.

42. The method of claim 37, wherein the ophthalmic device so produced comprises a collagen component having an amount of collagen between about 1% (w/w) and about 50% (w/w).

43. The method of claim 37, further comprising adding a cell growth enhancer agent to the combination.

44. The method of claim 37, further comprising curing the combination.

45. A corneal onlay, comprising an amount of collagen greater than about 1% (w/w) in a hydrated state, and being optically clear.

46. The corneal onlay of claim 45, wherein the onlay comprises a cross-linked collagen polymers.

47. The corneal onlay of claim 45, wherein the amount of collagen is between about 1% (w/w) and about 30% (w/w).

48. The corneal onlay of claim 45, wherein the amount of collagen is greater than about 6% (w/w).

49. The corneal onlay of claim 45, wherein the amount of collagen is between about 10% (w/w) and about 24% (w/w).

50. The corneal onlay of claim 45, wherein the composition is not a naturally occurring cornea.

51. The corneal onlay of claim 45, wherein the onlay comprises cross-linked recombinant collagen.