Multi-Purpose Solution Up to 20 hours of moisture Our laboratory research shows that Biotrue multi-purpose solution helps keep lenses moist for up to 20 hours. Conditions, cleans, removes protein, disinfects, rinses, stores, for soft contact lenses including silicone hydrogel lenses Biotrue Multi-Purpose Solution for Soft Contact Lenses including silicone hydrogel lenses Works Like Your Eyes The world can be tough on your eyes when you wear contact lenses. In a world of less sleep and more computer use it can be difficult for your eyes to stay comfortable and moist, especially when wearing contacts. Biotrue multi-purpose solution makes wearing contact lenses easier on your eyes. Biotrue is easier on your eyes because it works like your eyes. Biotrue has the same pH as healthy tears and a lubricant found in your eyes.