Artelac nighttime gel is used to calm and relive persistent dry eye symptons due to chronic tear deficiency due to the complex nature of tear dysfunction artelac nighttime gel is designed to supplement the three layers of the tear film including the very important outer lipid layer to seal in moisture for long term relief artlelac nighttime gel is designed for people suspected of having evaporative lipid tear film dysfunction but as a gel people with more severe and persistant dry eye can a