Patent ID: 6309658
Filing Date: 2001-10-30
Classification: A61L

Abstract:
A method of disinfecting or cleaning and disinfecting a soft contact lens with a multi-purpose solution or effective multipurpose solution, which method comprises:(a) soaking the lens in an ophthalmically safe solution, such that acceptable disinfection of the contact lens is obtained within a minimum recommended soaking period, the solution comprising, in formulation, the following components:(i) 0.010 to 1.0 percent by weight of the solution of an alkali metal carbonate or bicarbonate salt;(ii) an effective amount of a buffering system comprising one or more non-carbonate buffers which non-carbonate buffers provide a buffering capacity of 0.01 to 0.5 nM of 0.01 N of HCl and 0.01 to 0.3 of 0.01 N of NaOH to change the pH one unit;(iii) an effective amount of a non-ionic surfactant;(iv) an effective amount of at least one germicide; and(b) directly placing the treated lens on the eye of the wearer, such that (i) rinsing with a different solution prior to placement on the eye is not generally required, and (ii) no other solution is generally required for daily cleaning of the lens.