Wettable hydrogel materials for use in ophthalmic applications and methods
View Patent ↗A contact lens is provided that has extended and rechargeable wettability. The contact lens includes a lens body that is a reaction product of a polymerizable composition. A first polyhydric alcohol having a 1,2 diol or 1,3 diol moiety is present on a lens surface of the lens body. A contact lens package including the contact lens, and methods of producing and using the contact lens, are also provided.
1. A method of manufacturing a hydrogel contact lens body, comprising:
(i) providing a polymerizable composition comprising
at least one polymerizable form of a boronic acid, boronic ester, boronic anhydride, or combination thereof;
at least one hydrophilic monomer, and
at least one crosslinking agent; and
(ii) cast molding the polymerizable composition in a contact lens mold assembly to form a polymerized reaction product that is an uncomplexed hydrogel lens body formed of a copolymer comprising
polymerized units of the at least one polymerizable form of the boronic acid, boronic ester, boronic anhydride or combination thereof,
polymerized units of the at least one hydrophilic monomer, and
crosslinks formed by the at least one crosslinking agent;
wherein the uncomplexed hydrogel lens body has
an advancing contact angle less than about 120°,
a modulus less than about 1.6 MPa,
an ionoflux less than about 7×10 −3 mm 2 /min.,
an oxygen permeability of less than about 120 Barrers, and
an equilibrium water content of at least about 30%.
2. The method of claim 1 , wherein the at least one polymerizable form of the boronic acid, boronic ester, boronic anhydride or combination thereof is a boronic acid having the structure:
3. The method of claim 1 , wherein the at least one hydrophilic monomer comprises a hydrophilic monomer having at least one vinyl moiety.
4. The method of claim 1 , wherein the at least one crosslinking agent comprises a crosslinking agent having at least one vinyl moiety.
5. The method of claim 1 , wherein the polymerizable composition further comprises at least one silicone-containing monomer, macromer or prepolymer, the copolymer further comprises polymerized units of the at least one silicone-containing monomer, macromer or prepolymer, and the uncomplexed hydrogel contact lens body comprises an uncomplexed silicone hydrogel contact lens body.
6. The method of claim 5 , wherein the at least one silicone-containing monomer, macromer or prepolymer comprises a silicone-containing macromer or prepolymer having an average molecular weight greater than about 2,000 Daltons.
7. The method of claim 5 , wherein the at least one silicone-containing monomer, macromer or prepolymer comprises a silicone-containing monomer, macromer or prepolymer having at least at least about 10 ethylene oxide (EO) units in its backbone, side chains or both.
8. The method of claim 5 , wherein the at least one silicone-containing monomer, macromer or prepolymer comprises a silicone-containing monomer, macromer or prepolymer having a ratio of the number of ethylene oxide (EO) units present to the number of dimethyl siloxane (DMS) units present of from about 0.20 to 0.55.
9. The method of claim 1 , wherein molding surfaces of the contact lens mold assembly comprise a thermoplastic resin.
10. The method of claim 1 , further comprising
(iii) contacting the uncomplexed lens body with a complexing solution comprising at least one wetting agent, and complexing at least a portion of the wetting agent present in the complexing solution with at least a portion of boronic acid moieties present in the copolymer of the lens body to produce a complexed hydrogel lens body.
11. The method of claim 10 , wherein the at least one wetting agent is covalently bonded to at least a portion of the boronic acid moieties present in the copolymer of the lens body.
12. The method of claim 1 , further comprising
(iii) contacting the uncomplexed lens body with a complexing solution comprising at least one polyhydric alcohol having at least one 1,2 diol or 1,3 diol moiety, and complexing at least a portion of 1,2 or 1,3 diol moieties present in the complexing solution with at least a portion of boronic acid moieties present in the copolymer of the lens body to produce a complexed hydrogel lens body.
13. The method of claim 1 , further comprising
placing the uncomplexed lens body in a contact lens blister package with a packaging solution, sealing the blister package, and sterilizing the packaging solution and the lens body.
14. The method of claim 12 , wherein an advancing contact angle of the complexed lens body is at least 10% less than an advancing contact angle of the uncomplexed lens when both the complexed lens body and the uncomplexed lens body are tested after being hydrated and after soaking in phosphate buffered saline for at least 6 hours.
15. A hydrogel lens body, comprising:
a cast molded polymerized reaction product of a polymerizable composition reacted in a contact lens mold assembly to produce a hydrogel contact lens body, the polymerizable composition comprising
at least one polymerizable form of a boronic acid, boronic ester, boronic anhydride, or combination thereof;
at least one hydrophilic monomer; and
at least one crosslinking agent;
the hydrogel lens body formed of a copolymer comprising
polymerized units of the at least one polymerizable form of the boronic acid, boronic ester, boronic anhydride or combination thereof,
polymerized units of the at least one hydrophilic monomer, and
crosslinks formed by the at least one crosslinking agent;
wherein at least a portion of boronic acid moieties present in the copolymer of the lens body are complexed with a wetting agent, and the lens body is a complexed lens body, wherein an uncomplexed lens body has
an advancing contact angle less than about 120°,
a modulus less than about 1.6 MPa,
an ionoflux less than about 7×10 −3 mm 2 /min.,
an oxygen permeability of less than about 120 Barrers, and
an equilibrium water content of at least about 30%; and
the complexed lens body has an advancing contact angle at least 10% less than an advancing contact angle of the uncomplexed lens body, as determined by testing hydrated lens bodies soaked in phosphate buffered saline for at least 6 hours.
16. The hydrogel lens body of claim 15 , wherein the wetting agent comprises at least one polyhydric alcohol having 1,2 or 1,3 diol moieties present on the at least one polyhydric alcohol.
17. The hydrogel lens body of claim 15 , wherein the wetting agent is a polymeric wetting agent.
18. The lens body of claim 15 , wherein the at least one polymerizable form of the boronic acid, boronic ester, boronic anhydride or combination thereof is a boronic acid having the structure:
19. The hydrogel lens body of claim 15 , wherein the at least a portion of boronic acid moieties present in the copolymer of the lens body are covalently bonded to the wetting agent.
20. The method of claim 10 , wherein the at least one wetting agent is a polymeric wetting agent.
21. The method of claim 10 , wherein the complexing solution comprising at least one polyhydric alcohol having at least one 1,2 diol or 1,3 diol moiety, and the complexing comprises complexing at least a portion of 1,2 or 1,3 diol moieties present in the complexing solution with at least a portion of boronic acid moieties present in the copolymer of the lens body.
22. The method of claim 10 , wherein an advancing contact angle of the complexed lens body is at least 10% less than an advancing contact angle of the uncomplexed lens when both the complexed lens body and the uncomplexed lens body are tested after being hydrated and after soaking in phosphate buffered saline for at least 6 hours.