A safe and effective formulation with no preservatives. This unpreserved ointment, when applied to the eyes, forms a smooth, comfortable protective film, especially useful for nighttime protection and lubrication of dry eyes. For use as a lubricant to prevent further irritation or to relieve dryness of the eye. If you suffer from overly dry, irritated eyes that make it hard to fall asleep and stay asleep, there is relief in sight.