For the temporary relief of burning, irritation and discomfort due to dryness of the eye or exposure to wind and sun. May be used as a protectant against further irritation. REFRESH PLUS Lubricant Eye Drops does more than just soothe and relieve dry and irritated eyes. It also provides long-lasting moisturizing protection in a formula that contains many of the same healthy qualities as natural tears. Formulated for mild-to-moderate dry eye, REFRESH PLUS is preservative-free for sensitive eyes, and can be used as often as needed to provide 24-hour comfort. What Can Cause Dry Eye? Heating and air conditioning. Computer use and reading. Wind and sun. Certain medications. Natural aging process. LASIK procedures.