Hylo Care Preservative Free Eye Drops (7.5ml). The surface of your eye is covered by a thin layer of tears, called the Tear Film which protects, nourishes and lubricates the eye.. HYLO-Care® contains a natural occurring substance called Sodium Hyaluronate which replenishes the tear film.. At a concentration of 0.1% it offers effective relief for more severe and persistent dry eye symptoms.. HYLO-Care® also contains Dexpanthenol which provides the surface of the eye with an effective environment to support healing post operation or eye injury.