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Artificial tear that combines the two ideal active ingredients for dry eyes, CARMELOSA carboxymethylcellulose and sodium hyaluronate. Relieves dry eye symptoms, reduces pain, itching, irritation and dryness. Can be used with contact lenses. How to use: The usual dose is 1 or 2 drops of Optava in each affected eye, 2 times a day or as needed. Can be used up to 6 months after first opening