OPTASE Moist Heat Mask is designed to give you effective relief from dry eye and other related eye problems. It features HydroBead Technology, which absorbs moisture from the air and releases a natural, constant moist heat. Each application of OPTASE Moist Heat Mask will provide the recommended 10-minutes of Moist Heat Therapy. Moist Heat Therapy loosens the oils in the Meibomian Glands allowing the oil to flow more freely and helps soften eyelash debris. The application of Moist Heat prevents the evaporation of natural tear film whilst restoring moisture to the eye and surrounding area. OPTASE Moist Heat Mask is simple to use: just 25 seconds in the microwave will provide 10 minutes of the prescribed Moist Heat Therapy.