Therapeutic dosing of TheraTears is prescribed for mucous deficiencies associated with dry eye. The dosing is generally for 1-2 weeks followed by maintenance dosing of only a few drops daily if necessary. The conjunctiva, the clear membrane that lines the white of the eye (sclera) and the inner lining of the eyelids, contains cells that produce mucin. Mucin is a glycoprotein that is found in tears. It forms a viscous solution and will act as a lubricant or protectant for the eyes.