Refresh Optive Mega-3 For Dry Eye associated with MGD. When our natural tears evaporate, our eyes get dry, itchy, irritated, and uncomfortable. Refresh Optive Mega-3 prevents tear evaporation and is clinically proven to treat the signs and symptoms of Dry Eye often caused by Meibomian Gland Dysfunction (MGD). MGD is a common eye condition that occurs when the tiny glands in our eyelids become blocked and cannot secrete enough oil to our eye’s tear film. This causes our natural tears to evaporate and results in the painful symptoms of Dry Eye. Refresh Optive Mega-3 is one of the artificial tear with a unique blend of flaxseed and castor oils. This preservative-free, low-blur formula helps keep tears intact, nourishing all three tear film layers for long-lasting symptom relief.