How to consider the ionization degree of soft mirror materials

Considering the ionization degree of soft mirror materials from the perspective of safety. The main material of soft contact lenses in the market is silicone hydrogel. For safety reasons, its material properties are water-containing, ionic, breathable and ionic, which affects the formation of sediments. Soft lens materials are mostly negatively charged, and positively charged substances in tears react with the lens, which will form precipitation on the lens surface. This substance is ionic and easy to precipitate, and is generally used as disposable soft lenses.