Ophthalmic Device and Related Methods and Compositions
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.
1 . An optically clear biosynthetic composition comprising cross-linked collagen, wherein the composition comprises an amount of collagen between about 5% and about 50% by weight or volume.
2 . The composition of claim 1 , wherein the amount of collagen is at least 6% by weight or volume.
3 . The composition of claim 2 , wherein the amount of collagen is at least 10% by weight or volume.
4 . The composition of claim 3 , wherein the amount of collagen is between about 10% and about 30% by weight or volume.
5 . The composition of claim 4 , wherein the amount of collagen is between about 10% and about 24% by weight or volume.
6 . The composition of claim 1 , wherein the cross-linked collagen comprises one type of collagen.
7 . The composition of claim 1 , wherein the cross-linked collagen comprises two or more types of collagen.
8 . The composition of claim 1 , which further comprises a cell growth enhancer agent.
9 . The composition of claim 8 , wherein the cell growth enhancer agent is a peptide.
10 . The composition of claim 9 , wherein the peptide has an amino acid sequence of RGD, YIGSR, or IKVAV.
11 . The composition of claim 8 , wherein the cell growth enhancer agent is selected from the group consisting of neurotrophic factors, nerve growth factors, and epidermal growth factors.
12 . The composition of claim 11 , wherein the cell growth enhancer agent is distributed substantially throughout the composition.
13 . The composition of claim 1 , wherein the collagen is the sole water-swellable polymer of the device.
14 . The composition of claim 1 , wherein collagen was cross-linked at an acidic pH.
15 . The device of claim 14 , wherein the acidic pH is between about 45.0 and about 5.5.
16 . The composition of claim 1 , wherein the cross-linked collagen comprises atelocollagen, type I collagen, type III collagen, or a combination thereof.
17 . The composition of claim 1 , wherein the cross-linked collagen comprises recombinant collagen.
18 . The composition of claim 1 , wherein the cross-linked collagen comprises collagen isolated from an animal.
19 . The composition of claim 1 , wherein the cross-linked collagen is produced by a process of cross-linking collagen polymers using a cross-linker other than glutaraldehyde.
20 . The composition of claim 19 , wherein the cross-linked collagen is produced by a process of cross-linking collagen polymers using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide.
21 . The composition of claim 1 , which further comprises poly (N-isopropylacrylamide-co-acrylic acid), chondroitin sulfate, N,O-carboxymethylchitosan, hyaluronic acid, hyaluronic acid aldehyde or alginate.
22 . The composition of claim 1 which is effective in facilitating nerve growth on and/or into the composition.
23 . A method of making a composition according to claim 1 , comprising:
combining collagen polymers with a cross-linker agent at an acidic pH; and
curing the resultant combination to form the composition comprising cross-linked collagen.
24 . The method of claim 23 , 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 resultant combination.
25 . The method of claim 23 , wherein the combining occurs at a temperature between about 0° C. and about 5° C.
26 . The method of claim 27 , further comprising adding a cell growth enhancer agent to the combination.
27 . A method of treating an ophthalmic disease, disorder, or injury comprising:
contacting an eye of a subject having said ophthalmic disease, disorder or injury with an ophthalmic device manufactured from a composition according to claim 1 .
28 . Use of the composition according to claim 1 to manufacture an ophthalmic device for treating an ophthalmic disease, disorder or injury in a subject in need thereof.
29 . Use of the composition according to claim 1 for treating an ophthalmic disease, disorder or injury in a subject in need thereof.