Benzalkoniumklorid, der almindeligvis bruges som konserveringsmiddel i øjenpræparater, er beskrevet at kunne forårsage punktvis keratopati og/ eller toksisk ulcerøs keratopati.
Benzalkonium chloride, which is commonly used as a preservative in ophthalmic products, has been reported to cause punctate keratopathy and/ or toxic ulcerative keratopathy.