REFRESH TEARS lubricating eye drops do more than just soothe and relieve dry, irritated eyes. REFRESH TEARS creates a shield of protection against further irritation with its unique, long-lasting lubricant, CMC. REFRESH TEARS lubricating eye drops is an ocular lubricating solution containing CMC and is intended for use in the eye. REFRESH TEARS contains Purite, a preservative that dissipates into water and sodium chloride-components of natural tears-when exposed to ambient light.