ABSTRACT A study of the antimicrobial effectiveness of three soft contact lens care systems, In‐A‐Wink, Oxysept, and Hydrocare revealed that viable microorganisms are less likely to be present in the storage solution of the Hydrocare system than in either the Oxysept or In A‐Wink systems after lenses are removed by patients. The limited antimicrobial activity of sorbic acid in the In‐A‐Wink neutralizing solution could be attributed to the pH of the formulation. It is recommended that the neutralizing solution be discarded after the lenses are removed from the case, as microorganisms transferred by the hands to the solution in the case could remain viable, thus increasing the risk of eye contamination.
TSE et al. (1987) studied this question.