Hydrogel contact lenses and package systems and production methods for same
View Patent ↗Contact lenses ready for use in an eye are provided including a contact lens body containing a hydrophilic polymeric component and a water soluble polymer component. Such contact lenses, which preferably are wet cast molded, are particularly useful as disposable or single use lenses. New contact lens packaging systems and production methods are also provided.
1. contact lens package, comprising:
a cavity;
a contact lens disposed in the cavity, the contact lens comprising a reaction product of a polymerizable composition comprising an amount of a water soluble polymer, at least one hydrophilic monomer, and at least one cross-linking monomer reactive with the at least one hydrophilic monomer;
a packaging liquid disposed in the cavity and in contact with the contact lens, the packaging liquid including an additional amount of the water soluble polymer;
wherein the water soluble polymer is a polyalkyelene glycol; and
a seal surrounding the cavity to maintain the contact lens in a sterile environment.
2. The package of claim 1 , wherein the contact lens is a cast molded contact lens.
3. The package of claim 1 , wherein the contact lens is a hydrogel-containing contact lens.
4. The package of claim 1 , wherein the contact lens includes a hydrophilic polymeric material and the water soluble polymer is present in the contact lens in an amount of about 1% to about 50% by weight of the hydrophilic polymeric material.
5. The package of claim 1 , wherein the contact lens includes a hydrophilic polymeric material and the water soluble polymer is present in the contact lens in an amount of about 10% to about 30% by weight of the hydrophilic polymeric material.
6. The package of claim 1 , wherein the polyalkylene glycol is polyethylene glycol.
7. The package of claim 1 , wherein the contact lens comprises at least two water soluble polymers.
8. The package of claim 1 , wherein the liquid is a material selected from the group consisting of an aqueous liquid, a saline solution, and a buffered saline solution.
9. The package of claim 1 , wherein the package is sterilized.
10. The package of claim 1 , wherein the contact lens is a single use contact lens.
11. The package of claim 1 , wherein the at least one hydrophilic monomer is selected from the group consisting of hydroxalkyl acrylates, hydroxyalkyl methacrylates, N-vinyl pyrrolidone, acrylamides, vinyl alcohol, hydrophilic polyurethane precursors, glycerol acrylates, glycerol methacrylates, acrylates, methacrylates, and mixtures thereof.