eye wash is extremely low—generally around 0.02%—and unlikely to pose any harm. Certain prescription and OTC ophthalmic solutions can contain as much as 0.5% to 1.0% boric acid, levels of ...

Ionic-buffering systems are the latest class of ophthalmic preservatives to be ... is a combination of boric acid, zinc, sorbitol and propylene glycol. This ionic-buffered system has been shown ...