Patients should wash their hands before using the eye wash, and when using it, pour the bottle of eye wash into the corresponding silicone eye wash cup of about 5mL, about half of the cup, lower your head face down, gently adsorb the silicone eye wash cup to the eye socket, raise your head back, open your eyes, blink, open your eyes again, blink, and turn your eyes at the same time, so that the eye wash is fully infiltrated with your eyes for 5-20 seconds per eye. Then lower your head and take down the eye wash cup and pour the liquid out of the cup, that is, after washing your eyes. Usually after washing one eye, you can directly wash the other eye. Do not contaminate the eyewash solution when storing it, and be sure to pay attention to hygiene.