How do i reverse redness in both eyes from eye drop over use, caused by months of using naphcon a eye drops?

Stop the Naphcon A: Excessive use of eye drops containing preservatives can cause a condition called "medicamentosa". Treatment involves stopping the offending eyedrop and switching to an artificial tear that does not contain preservatives. The labeling should state: "preservative free". Since many serious eye problems can cause redness you should contact a local eye doctor as soon as possible.