Catalytic neutralization of hydrogen peroxide

Hydrogen peroxide contact lens solutions require the use of a catalytic disc, which is inserted or affixed in the lens case. This disc helps to neutralise the hydrogen peroxide while disinfecting the lenses. The lenses must be left in the solution for a minimum of six hours. This procedure must be strictly followed to avoid discomfort caused by residual hydrogen peroxide.

Because this method requires a slightly larger lens case, it also means a higher consumption of solution.

The process of neutralisation may be either enzymatic or catalytic. During the neutralisation process, the peroxide is broken down into oxygen and water.