Product Description Optase Dry Eye Spray is designed to relieve dry and irritated eyes as well as soothe the eyelids. This preservative free spray contains natural ingredients in an easy to use bottle that will last up to three months once opened. The lipid layer in the eye prevents tears from evaporating and running over the lid margin. A lack of lipids can lead to dry eye by causing an increased evaporation of the tear film. Optase Dry Eye Spray contains lipids which mix with the eyes natural lipids produced by the Meibomian glands at the lid margin once sprayed upon closed eyes. This lipid mix spreads onto the tear film upon opening the eye to stabilise it. In addition to stabilising the lipid layer, the lipids in Optase Dry Eye Spray moisturise the eye area and protect the skin. You can use the spray several times a day and while wearing contact lenses. Just make sure that your eye lids are closed and that you spray from a distance of 15 25cm. Need more optical advice help? Ask our optical experts