Hydrogen peroxide
The majority of hydrogen peroxide solutions are 3% hydrogen peroxide. This enables the solution to break down any proteins that coat the contacts after a long period of use. Hydrogen peroxide is always used alongside a neutralizing product. The intention is to prevent the hydrogen peroxide from contact with the eye, which could damage the corneal cells in the epithelium. While this would not result in permanent damage, it can cause an intense burn that can linger even after an eye rinse. Burned cells heal very quickly once the natural tear film is restored.