Artificial tears are more commonly used in ophthalmology, this drug is mainly used for dry eye relief, currently in the clinical can choose artificial tears without preservatives, mainly including sodium glassate eye drops and polyvinyl alcohol eye drops these two kinds of artificial tears. Sodium vitrate eye drops, also known by the trade name Hailu eye drops, and polyvinyl alcohol eye drops, which also do not contain preservatives, are the two eye drops that are currently used more often. These eye drops mimic the composition of human tears and can function to moisten the cornea as well as the eye, which can improve the symptoms of dry eyes. Since these eye drops do not contain preservatives, the side effects on the eyes will be relatively less, so you can choose to use them for a long time. The use of this drug does not have to be very regular, when the symptoms of dry eyes are more obvious, you can increase the frequency of eye dots.