Patent ID: 8759321

Claim:
A method of cleaning and disinfecting a contact lens, the method comprising soaking the contact lens in a multi-purpose lens care solution for at least two hours, the lens care solution comprising: 0.8 ppm to 2 ppm of poly(hexamethylene biguanide); 0.002 wt. % to 0.015 wt. % of hyaluronic acid, wherein the weight ratio of hyaluronic acid to poly(nexamethylene biguanide) in the composition is from 45:1 to 120:1; and 0.5 ppm to 2 ppm of α-[4-tris(2-hydroxyethyl)-ammonium chloride-2-butenyl]poly[1-dimethyl ammonium chloride-2-butenyl]-ω-tris(2-hydroxyethyl)ammonium Chloride, wherein the lens care solution maintains disinfecting ability against each of S. aureus, P. aeruginosa, S. marcescens, C. albicans and F. solani , for a storage time period of up to and including four months at 30° C., in accordance with FDA-Premarket Notification 510(k) Guidance Document for contact lens care products.