from drops for dry eyes to lock in moisture, to preservative-free formulas; and contact lens drops to keep your contacts clean and hydrated.

Preservatives are added to multidose medication bottles to inhibit microbial contamination. An assortment of different preservative formulations has been used in ophthalmic medicines and many of ...

Polyquad ® is a detergent-type preservative derived from BAK. Polyquad was formulated in the mid 1980s by Alcon as a preservative for contact lens storage solutions. It was developed because ...

Likewise, its non-toxic nature allows frequent use without the risk of adverse effects, especially when added to preservative-free formulations. Unlike artificial tears that provide only moisture and ...