Occasional use of eyewash is generally not harmful to the eyes, but prolonged use of eyewash may be harmful to the eyes and may cause inflammation and dependence on the medication. Occasional use of eyewash is not harmful to the eyes, and it can wash away foreign objects that may have gotten onto the surface of the eyes by mistake. However, prolonged use of eyewash can lead to inflammation of the eye due to imbalance of the eye flora. Eyewash may contain dipotassium glycyrrhizinate and chlorpheniramine maleate, which may damage the mucin in the cornea of the eye if used for a long time, and reduce the activity of conjunctival cells, making the eyes red and sore easily. There are many types of eyewash on the market, and some of them are even of unknown composition, so it is best not to use them, so as not to affect the health of the patient’s eyes.