Topical eye drops for the treatment of ophthalmic diseases is the most commonly used, the simplest means of treatment in ophthalmology, but some people can not be correct eye drops, and affect the efficacy, so only the correct eye drops treatment is more effective and safer to use. Generally our people conjunctival sac maximum capacity of 20 microliters, and our eye drops a drop of 50 microliters, so the general eye drops 1 drop is enough to use, drops more are also lost. The general number of eye drops 4 to 6 times / day (except for special requirements). Each time 1 drop; if more than two kinds of eye drops can be each 10 to 20 minutes apart; at the same time, the eyes are closed after the drug to reduce the discharge of the drug to ensure efficacy. However, when dropping eye drops, we should pay attention to firstly, the medicine bottle should not touch the eye, and when using the suspension, the medicine should be shaken well before use; secondly, the medicine should generally not be dropped on the cornea, but should be dropped on the fornix; and for the toxic medicine, lightly press the tear sac after dropping to avoid absorption poisoning; again, check the name of the medicine, the color, and the period of use before using the medicine to ensure cleanliness and no pollution, and avoid using expired, unclean and deteriorated medicine, which can cause Avoid the use of expired, unclean and deteriorated potions, which may cause undesirable consequences. Finally, the clinical use of stable, strong, less toxic, non-irritating, easy to store eye drops.