Other Information: Store at room temperature. Misc: Preservative-free. Sterile. Bion Tears Lubricant Eye Drops is an advanced tear substitute especially formulated and packaged for persistent dry eye conditions requiring frequent therapy. www.tearsnaturale.com. Guaranteed: To fully assess comfort, a 3 to 4-week trial of Bion Tears is recommended when switching from another brand of lubricant eye drops. Made in France.