Lumify is an FDA approved, effective redness reliever for temporary redness. It works within 1 minute and lasts for up to 8 hours. It works differently than other redness reliever drops by stimulating selective receptors on the blood vessels that in turn causes constriction of the blood vessels, without causing other side effects that we see with other OTC redness reliever drops. (those side effects include loss of effectiveness over time and rebound redness-the eyes get more red once the drop wears off). While we do give these drops a "Thumbs-Up", we suggest scheduling an appointment with one of our doctors if the redness persists for longer than 3 days.