What is a possible outcome of using high concentrations of sorbic acid in soft contact lenses?

Using high concentrations of sorbic acid in soft contact lenses can lead to corneal epithelial cell damage. Sorbic acid is a preservative that, while effective at preventing microbial growth, can be cytotoxic at elevated concentrations. High levels of this substance can disrupt the integrity of the corneal epithelial cells, leading to potential damage or irritation.

The other choices do not adequately address the impact of high concentrations of sorbic acid. For example, while increased tear evaporation might occur with some lens materials or conditions, it is not a direct consequence of sorbic acid concentration itself. Enhanced lens clarity is not a known effect of sorbic acid; instead, it might actually compromise clarity due to potential toxicity. Lastly, stating that high levels of sorbic acid have no significant impact on corneal cells fails to acknowledge the risk of cellular damage that can arise with higher concentrations.