ReNu with MoistureLoc - a literature review

Dr James Wolffsohn, in co-operation with Roya Borazjani, Sue Groeminger and Dharmendra Jani, reviews the literature regarding the performance of a multipurpose solution

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Approximately 90 per cent of care solutions prescribed for contact lens wear are multipurpose.1 Multipurpose solutions were introduced to improve patient compliance and despite initial fears that they would compromise disinfection of contact lenses, it is now clear that this is not the case. Studies have confirmed that compliance is generally better with multipurpose solutions than a multi-step care regimen.2 Multipurpose solutions offer excellent cleaning and disinfection properties, together with being easy to use. With 60-70 per cent of soft lenses prescribed in the UK requiring care products,1 prescribing appropriate care solutions is still an important area of contact lens practice.

Bausch & Lomb claims to have enhanced the performance of multipurpose solutions using a new disinfectant/preservative, alexidine, and a proprietary combination of non-ionic surfactants and moisture-retaining polysaccharides. Alexidine has an altered chemical structure compared to other compounds of the biguanide group, resulting in highly effective disinfection, but low toxicity. ReNu with MoistureLoc consists of two main polymers that work synergistically with the lens: