Murine Advanced Dry Eye Relief is suitable for the immediate, long-lasting relief & protection of dry, irritated, itchy or strained eyes. Advanced System for Preservative-Free Drops Murine\'s patented filtration system ensures every drop is sterile for up to 90 days from opening without the need for added preservatives. Advanced Formulation Clinically proven Murine is formulated with the most advanced active ingredient for dry eyes. It is perfectly balanced to work with your tears for optimal comfort and relief plus protection from further dryness and irritation. Advanced Treatment for Dry eyes caused by, for example, computer and mobile use, overwork, age, hormonal changes, medicines, contact lenses, laser eye surgery and environmental conditions such as wind, dust, pollution, heating or air conditioning. Discard 90 days after first opening.