METHODS AND COMPOSITIONS FOR MANUFACTURING TINTED OPHTHALMIC LENSES

摘要

The invention relates to a process for the manufacture of tinted ophthalmic moldings comprising the steps of: (a) providing a water soluble polymer precursor having cross-linkable or polymerizable groups; (b) providing a pigment dispersion comprising an inorganic or organic pigment and a dispersing agent; (c) mixing the pigment dispersion with the polymer precursor to form a tinted prepolymerization mixture; (d) dispensing the tinted prepolymerization mixture into a mold; (e) applying radiation to the tinted prepolymerization mixture in the mold, thereby cross-linking or polymerizing the polymer precursor and entrapping the pigment within the polymeric network of the resultant ophthalmic molding, and (f) opening the mold so that the ophthalmic molding can be removed from the mold. According to the process, tinted ophthalmic moldings, particularly full-body tinted soft contact lenses having improved properties, are prepared with an improved efficiency.