For any glaucoma patient, there is a short or long experience of eye drops, from a few days or months to a few years or even a lifetime, and eye drops have been integrated into the daily life of glaucoma patients as three meals a day. Therefore, it is very important to know the correct way to use eye drops, because it will directly affect the effect of eye drops, the progress of glaucoma, the doctor’s judgment, and the patient’s prognosis. What is the correct way to use eye drops? (1) Before using the medicine, pay attention to check whether the name, concentration and expiration date of the medicine used match the package, whether there is turbidity or flocculation in the eye drops, and whether there are color changes. Eye drops made in suspension form should be shaken evenly before use. The patient should wash his hands before dispensing, take a reclining or sitting position, tilt his head back, open his eyes and look upward, separate the upper and lower eyelids with the index finger and thumb, put one drop of eye drops in the conjunctival sac at the outer corner of the eye, lift the upper eyelid slightly to keep the solution in the conjunctival sac as much as possible, and then gently close the eyes for 2 to 3 minutes. Note: One drop of eye drops at a time is enough, because the amount of eye drops is about 30 microliters (25 to 35 microliters), and the volume that can be stored in the conjunctival sac is usually only 7 microliters, which can only be increased to 30 microliters at most when ordering the drops. Therefore, ordering several drops of eye drops at a time is just a waste of money. (2) The drops generally contain preservatives, which can cause damage to the surface of the eye if used too frequently. You should also avoid using drops when wearing contact lenses. (3) Do not use eye drops casually, but according to the doctor’s instructions. (4) Close your eyes after dispensing. Each blink of the eyelids increases the speed of excretion of the medication. For every blink of the eyelids, about 2 microliters of medication is excreted through the nasolacrimal duct. (5) Pressing the inner corner of the eye after dosing can reduce the side effects of the medication. The medicine will flow to the nasal cavity and throat through the nasolacrimal duct, be absorbed by the mucous membrane epithelium, and circulate to the whole body through the blood, which may cause systemic side effects, and some medicine will have an unpleasant taste. Pressing the inner corner of the eye for 3 minutes after dispensing can prevent the medication from flowing into the nasolacrimal duct through the tear dots. (6) Do not apply different kinds of drops at the same time. The lacrimal circulation will excrete the medication within 5 minutes, so order one type of medication after 5 minutes, so that the first type of medication will not be diluted and the effect of each type of medication will be fully utilized. (7) When using both potion and ointment, you should use the potion first and then order the ointment. (8) The ointment should be put into the lower conjunctival sac about half a centimeter long, and the ointment will automatically cover the surface of the eye when the eye is closed. (9) Dermatological or surgical ointments can be toxic to the eye, so do not apply ointments that are not for ophthalmology. (10) Do not place the ointment in high temperature, high humidity, or direct sunlight. Some drops need to be stored in a black bag away from light to avoid deterioration, some drops need to be stored at low temperatures, so after getting an eye drop, you should read the instructions in detail and understand the precautions for storage; if you find that the color of the drops has changed or cloudy precipitates have been produced when the drug is opened and used again, you should discard it; you should pay attention to the shelf life of unopened drops before ordering them. (11) Some drops are made in suspension form and should be shaken well before use. (12) Ask your doctor about the time to order the drops. Some drugs can be used at a fixed time to maximize their effect. Especially for glaucoma patients, it is possible to order a variety of drugs, and the effect of different drugs at different times is not the same, therefore, before the use of drugs should be discussed with a specialist, and to develop a reasonable number of medications and medication time, once set, we must strictly follow the time to order and adhere to the medication, and not arbitrarily change the drugs used and the time of medication. (13) Any abnormalities in the use of the medication should be reported to the doctor to determine if it is a normal reaction.