”Eye drops” is the most common method of eye care and eye disease treatment. However, incorrect use or even abuse of eye drops can bring harm to the eyes, commonly as follows: a. Dry eye disease The normal human conjunctival sac is covered with a layer of tear film on the surface of the eye, which plays the role of moistening, cleaning, dilution and sterilization of the eye. When we use eye drops for a long time, the normal tear film components are damaged, causing dry eyes, followed by corneal and conjunctivitis, especially the preservative ingredients contained in most eye drops, the impact on the tear film is very serious. At this time, we should pay attention to the following points when using eye drops: stop when you are sick, reduce the number of eye drops as much as possible and avoid long-term use of eye drops; try to choose eye drops that do not contain preservatives or contain preservatives in smaller doses, such as the daily dosage of packaged eye drops; seek medical consultation when dry eye symptoms occur, consult a professional doctor about the dosage of eye drops, and use artificial tears to treat dry eyes if necessary. If necessary, use artificial tears to treat dry eyes. Hormonal glaucoma In order to treat some special eye diseases, some eye drops contain hormonal ingredients, which have good efficacy but also carry certain side effects, especially if used incorrectly for a long time, which can easily cause hormonal glaucoma (glaucoma is a blinding eye disease). Therefore, the following points should be noted in the process of using hormone-containing eye drops: strictly follow the guidance of professional doctors; avoid long-term abuse for the blind pursuit of efficacy; when the manifestation of hormonal glaucoma appears, timely consultation should be made to control the development of glaucoma, and some patients recover normally after stopping the use of hormone-containing eye drops. Third, bronchial asthma, heart attack, allergy, etc. Like all drugs, the ingredients contained in eye drops may also cause allergic reactions in some people, such as itchy eyes, red eyes, pain, etc. When these symptoms appear, you should consult a professional doctor in time. In addition, there is a class of eye drops containing beta-blockers used for glaucoma treatment that can easily induce asthma and cardiac arrhythmia, so patients with a history of asthma or heart disease should talk to their doctor before using such drugs to avoid side effects.