Demulcents are substances that soothe mucous membranes and, in the case of artificial tears, offer lubrication in the form of a mucoprotective film. They could ease distress, assist in h2o retention and decrease friction through the ocular area. PVA, among the list of oldest demulcents, lowers a solution’s viscosity. https://epictetusr530iqx7.wikicommunications.com/user