Polyvinyl alcohol eye drops can be used as a lubricant to prevent or improve eye fatigue, dryness, foreign body sensation and other symptoms. Polyvinyl alcohol eye drops, the main component of which is polyvinyl alcohol, belongs to a kind of polymer, with hydrophilicity and film-forming properties, which can stabilize the tear film of the eyeballs to reduce the volatility of tears and replenish a certain amount of water for the eyeballs. In case of insufficient tear secretion in the eye, polyvinyl alcohol eye drops can form a tear film on the surface of the cornea of the eye and play a lubricating effect. For dryness, fatigue, foreign body sensation and other symptoms caused by dry eye disease and other diseases, through the properties of polyvinyl alcohol eye drops can play a certain preventive and ameliorative effect. Specific drug use please combine with their own situation, it is recommended that patients must use drugs under the guidance of a professional doctor to avoid adverse reactions.