The oil glands in the eyelid are critical to tear film structure and eye comfort. TheraTears Nutrition for Dry Eyes provides a special blend of pharmaceutical grade Omega-3 essential fatty acids that your eyes, lids and tear film need to function their best, but your body cannot produce. And most of us don?t get enough Omega-3s from our diet. TheraTears Nutrition provides these Omega-3s for eye comfort upon awakening and continued eye comfort throughout the day. Bottle contains a 30 day supply – 90 easy to swallow capsules.