IOL insertion device with lubricious coating
An insertion device for an intra-ocular lens (IOL) has a bilaminar, lubricious coating on the surface which contacts the IOL as it is being inserted into the eye. The bilaminar coating includes a highly lubricious top coat, and a polymeric base coat which is both highly adherent to the surface of the insertion device, and which has functional groups capable of grafting the base coat to the top coat. In its completed form, the bilaminar coating is essentially permanent, and exceedingly lubricious when wet, allowing the IOL to be advanced smoothly and without damage through the insertion device. The top coat may include hyaluronan, or another material capable of providing the required lubricity.
1. In an insertion device for an intra-ocular lens (IOL), the insertion device including a channel through which an IOL can be advanced while inserting the IOL into an eye, the channel having an interior surface which contacts the IOL,
the improvement wherein at least a portion of the interior surface of the channel has a bilaminar coating, the coating including a lubricious top coat, and a base coat which is chemically grafted to the top coat, wherein the base coat adheres to the interior surface of the channel without being covalently bonded to said surface, the base coat including functional groups capable of participating in reactions for grafting the base coat to the top coat.
2. The improvement of claim 1 , wherein the top coat comprises a lubricious, water-soluble polymer.
3. The improvement of claim 2 , wherein the polymer defining the top coat is selected from the group consisting of a polysaccharide, a cellulose derivative, polyacrylic acid and its water-soluble copolymers, and polyethylene glycol.
4. The improvement of claim 1 , wherein the top coat comprises hyaluronan.
5. The improvement of claim 1 , wherein the top coat includes at least one material selected from the group consisting of surfactants, crosslinking agents, plasticizers, solvents, salts, and leveling agents.
6. The improvement of claim 1 , wherein the base coat comprises a polymer or copolymer supplied in an organic solvent.
7. The improvement of claim 1 , wherein the base coat comprises a polymer or copolymer supplied as an aqueous colloidal dispersion or emulsion or a non-aqueous dispersion.
8. The improvement of claim 1 , wherein the insertion device is made of a material selected from the group consisting of polypropylene, acrylic polymers, acrylic copolymers, nylon, polyester, cellulose acetate, and acetate/butyrate.
9. An insertion device for an intra-ocular lens (IOL), comprising a moldable material defining a lumen through which the IOL can be advanced, the lumen being bounded by an interior surface of said moldable material, at least a portion of the interior surface having a bilaminar coating, the coating including a lubricious top coat, and a base coat which is chemically grafted to the top coat, wherein the base coat adheres to said interior surface without being covalently bonded to said surface, wherein the base coat includes functional groups capable of participating in reactions for grafting the base coat to the top coat.
10. The insertion device of claim 9 , wherein the top coat comprises a water-soluble polymer selected from the group consisting of a polysaccharide, a cellulose derivative, polyacrylic acid and its water-soluble copolymers, and polyethylene glycol.
11. The insertion device of claim 9 , wherein the top coat comprises hyaluronan.
12. The insertion device of claim 9 , wherein the top coat includes at least one material selected from the group consisting of surfactants, crosslinking agents, plasticizers, solvents, salts, and leveling agents.
13. The insertion device of claim 9 , wherein the base coat comprises a polymer or copolymer supplied in an organic solvent.
14. The insertion device of claim 9 , wherein the base coat comprises a polymer or copolymer supplied as an aqueous colloidal dispersion or emulsion or a non-aqueous dispersion.
15. The insertion device of claim 9 , wherein the moldable material is selected from the group consisting of polypropylene, acrylic polymers, acrylic copolymers, nylon, polyester, cellulose acetate, and acetate/butyrate.
16. A method of enhancing the lubricity of an insertion device for an intra-ocular lens (IOL), the insertion device including a channel having an interior surface along which the IOL is advanced, the method comprising applying a bilaminar coating to at least a portion of said interior surface, the bilaminar coating including a base coat and a top coat, the base coat being adherent to said interior surface without being covalently bonded to said surface, the base coat having functional groups which enable the base coat to become chemically grafted to a top coat, the top coat being lubricious.
17. The method of claim 16 , wherein the applying step is preceded by the step of cleaning said interior surface.
18. The method of claim 16 , wherein the applying step includes selecting the top coat from the group consisting of a polysaccharide, a cellulose derivative, polyacrylic acid and its water-soluble copolymers, and polyethylene glycol.
19. The method of claim 16 , wherein the applying step includes selecting the top coat to be hyaluronan.
20. The method of claim 16 , wherein the applying step includes selecting the top coat to include at least one material selected from the group consisting of surfactants, crosslinking agents, plasticizers, solvents, salts, and leveling agents.
21. The method of claim 16 , wherein the applying step includes selecting the base coat to include a polymer or copolymer supplied in an organic solvent.
22. The method of claim 16 , wherein the applying step includes selecting the base coat to include a polymer or copolymer supplied as an aqueous colloidal dispersion or emulsion or non-aqueous dispersion.