BAK Preservative: Benzalkonium Chloride is a common preservative in eye drops, including artificial tears. It can cause an allergic reaction in some people if the tears are used frequently. Try preservative-free single use vials of ocular lubricants and you should be okay for frequent dosing. Another alternative are these new electronic misting devices to spray a little cloud of clean water in your eyes. See EyeMD.
Answered 1/12/2016
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