Wettable hydrogel contact lens and method for producing same

摘要

Disclosed is a hydrogel contact lens which has improved and long-lasting wettability in the surface and inner structures, while exhibiting excellent contamination resistance, shape stability and mechanical strength. Also disclosed is a method for producing the hydrogel contact lens. The wettable hydrogel contact lens is characterized by containing an ionic hydrophilic polymer which is a compound having a hydroxy group and an anionic group. The method for producing a hydrogel contact lens is characterized in that a constituent component of the hydrogel contact lens is a copolymer containing at least a cationic monomer and an anionic monomer, and in that the method comprises a step wherein counter ions of the monomers form ionic bonds and a step wherein an ionic hydrophilic polymer, which is a compound having a hydroxy group and an anionic group, is contained.

主权项

1. A moisturizing hydrogel contact lens, comprising:
a copolymer prepared from at least a cationic monomer and an anionic monomer; an ionic hydrophilic polymer, wherein the ionic hydrophilic polymer is present on a surface and in an interior of the hydrogel contact lens, and wherein the ionic hydrophilic polymer is alginic acid or alginate; wherein ionic bonds are present between a cationic group of the cationic monomer component of the copolymer and an anionic group of the ionic hydrophilic polymer; and wherein a content of the alginic acid or alginate in an interior of the hydrogel contact lens is 128 μg/lens to 1215 μg/lens.