Hello. Thank you for visiting our store, we buy things in a licensed pharmacy in the European Union. irritated eyes when this condition is caused by environmental factors (intensive computer use, air conditioning, smoke). Composition The liquid contains 0.24% hyaluronic acid (as sodium hyaluronate), as well as excipients including sterile water, sodium chloride, potassium chloride, disodium phosphate dodecahydrate and sodium hydrogen phosphate dihydrate. Does not contain preservatives. Dosage The recommended dose is 1 drop 3-5 times a day or more often if necessary.