Hydrogen peroxide and multipurpose solutions both clean and disinfect contact lenses by breaking up and removing trapped debris, protein, and fatty deposits (lipids). Unlike multipurpose solutions, hydrogen peroxide solutions are preservative-free, which makes them a suitable option for those who are allergic or sensitive to the preservatives found in multipurpose solutions. They are not risk-free, however, and should be used with appropriate cautions.
Hydrogen peroxide placed directly into the eyes or on your contact lenses can cause stinging, burning, and temporary corneal damage. When using hydrogen peroxide you must follow the disinfecting process with a neutralizer. The neutralizer turns the peroxide into water and oxygen, making it safe to put your lenses back into your eyes.
Neutralization can be either a one-step or two-step process. The one-step process neutralizes your lenses during the disinfecting stage, while the two-step process neutralizes your lenses after the disinfecting stage.
Some storage cases have a neutralizer built-in, making it a simple one-step process. With other cases, a neutralizing tablet that comes with the hydrogen peroxide solution must be added. This is the two-step process.
Always consult your eye-care provider before deciding on the best cleaning and disinfecting method for your lenses. Never change your lens-care system before consulting your eye care provider.