A One Step Cleaning Solution For Contact Lens

An update on the question: How to clean contact lenses?

There has been an increasing number of complaints regarding contact lens solution and the manufacturers developed one-step systems for the cleaning of soft lenses that dominate the market today. These systems come in two types, peroxide and multipurpose solutions.

Both contain cleaners, such as bisphosphonate compounds which break down proteins adhering to lenses or surfactants, such as block copolymers, to interfere with the protein-lens interactions. The solutions also usually contain moisturizing or conditioning agents such as cellulose, propylene glycol, or polyvinyl pyrrolidone.

The peroxide neutralization reaction itself, as well as the O2 product bubbling through the solution, may further help to kill microbes. Typically, a lens wearer puts their lenses in the case with the peroxide solution and catalyst, and returns four to six hours later to find their lenses ready to wear. Peroxide, of course, will oxidize many things other than microbes, so one challenging aspect to solution formulation is to find cleaners or conditioning agents that can survive storage in a peroxide solution without degradation.

In contrast to peroxide solutions, multipurpose solutions typically use a polymeric disinfection agent such as polyhexamethylene biguanide or polyquaternium, which include quaternary ammonium centers. As with peroxide solutions, the disinfectant presents the biggest challenge to solution developers, although for a different reason: The solution, including the disinfectant, must be gentle enough that lens wearers can put their lenses directly into their eyes without rinsing.

Keeping you updated on breaking developments regarding how to clean contact lens.

RSS Eye Care Information

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