Patent ID: 8062607

Claim:
A lens care kit for cleaning and disinfecting contact lenses, comprising: a colored lens care solution including a water-soluble colorant and a microbiocidal compound; and a solid absorbing agent, wherein, when in contact with the colored lens care solution, the solid absorbing agent adsorbs the colorant over a time period sufficient to substantially discolor the colored lens care solution, thereby indicating that lenses under disinfecting and cleaning by the colored lens care solution are ready for use wherein the kit comprises a lens case having a well for holding a contact lens to be treated and an amount of the colored lens care solution, a compartment in fluid communication with the well, and a semi-permeable membrane is located between the well and the compartment, wherein the solid absorbing agent is activated charcoals and placed in the compartment of the lens case, wherein the semi-permeable membrane is capable of selectively or preferentially allowing the colorant to pass through so as to be absorbed by the charcoal in the compartment.