Alcon Laboratories, based out of Fort Worth ... Last year, it was believed that contaminated EzriCare Artificial Tears triggered more than 50 eye infections across 11 states.

[20] Polyquad is the main ingredient in Tears Naturale II (Alcon) and Opti-Free Express MultiPurpose Disinfecting Solution (Alcon), as well as other storage solutions for contact lenses.