Sterile. For rigid gas permeable contact lenses (fluorosilicone acrylate and silicone acrylate) and hard contact lenses. Contains no polyquad, chlorhexidine, polyaminopropyl biguanide, or BAK. No animal testing. Optimum Extra Strength Cleaner is a sterile non-preserved cleaning solution for use with silicone acrylate, fluorosilicone acrylate contact lenses and hard contact lenses. When used as directed, eliminates surface deposits, oils, lipids, salts, and cosmetic residue without the use of suspended abrasives. Optimum Extra Strength Cleaner is non-preserved and contains no suspended particles.