Polyethylene glycol, is a kind of artificial tears, it is mainly to relieve the dryness of the eyes, relieve the symptoms of dry eyes, it should be mainly applied to the eye water evaporation is too fast, or tear secretion is relatively small. What you should pay attention to is that you do because of dry eye, try to choose a single package without preservatives, that is, a small one a day single dose packaging type. In addition to this patients who are allergic to polyethylene glycol must be prohibited from using it. Pregnant and breastfeeding women should use the drug under the supervision of a doctor.