There are a few notes: 1, the eye drops remember to point into the conjunctival sac (see the diagram), do not point to the “eye black”, because we see the “eye black” part is our cornea, if a long time wrong point eye drops, may cause drug-related keratitis. If you mistakenly order eye drops for a long time, it may cause drug-related keratitis. 2, after the eye drops remember to close your eyes, while holding the inner corner of the eye, because here our tear duct system connected to the nasal cavity, some eye drops will flow into the nasal cavity, although local eye drops rarely have systemic side effects, but more to do such a move, can ensure that more eye drops stay in the eye, to ensure the effectiveness of the drug. 3, the general eye drops point 1 drop is enough, if drops to the outside of the eye, you can make up a drop, because the conjunctival sac is actually very small volume, can not accommodate two drops of eye drops. Therefore, if you have more than two kinds of eye drops to use, please interval 5-10 minutes before ordering the second eye drops.