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Chapter 148 Eye drops: just one or two drops at a time
When people use eye drops, they always feel that one or two drops is too little, and they always like to add a few more drops, thinking that only in this way can they be fully absorbed and have obvious effects, and they think that eye drops are external medicines, and there is no harm in using more.In fact, 1 to 2 drops of eye drops at a time is enough, and more drops not only cannot be absorbed, but may also cause adverse reactions.

Experts say that a drop of eye drops is about 30 microliters, and the capacity that can be stored in the conjunctival sac is usually only 7 microliters. After more eye drops, the capacity of the conjunctival sac can only increase to 30 microliters at most. Either overflow from the corner of the eye, or flow to the nasal cavity along the nasolacrimal duct.For those eye drops without toxic side effects and irritation, a few extra drops are just a waste.However, if eye drops with toxic side effects such as atropine and timolamide are used more often, obvious adverse reactions may occur.For example, a large amount of atropine used in a short period of time can make the patient's heart rate increase, dry mouth, and flushed face; while timolamide will slow down the heart rate of people suffering from coronary heart disease and other heart diseases, which in turn will lead to insufficient blood supply to the heart and induce Angina.

In addition, when some people instill eye drops, they are used to dotting both the diseased eye and the healthy eye, and in no particular order.If it is not an infectious eye disease, just touch the diseased eye.For infectious eye diseases (such as pink eye disease), in order to prevent the healthy eye from being infected, preventive medication can be given to the healthy eye, but in order to avoid cross-infection, the healthy eye should be injected first, and then the diseased eye.If possible, you can prepare two eye drops and use them separately, and you must wash your hands before each eye drop.

Experts reminded that if you need to order two or more eye drops, be careful not to order them at the same time. You should use the other after 5 minutes after you order one drug, so that all kinds of eye drops can be fully absorbed. .It should be noted that the correct position of the eye drops is in the small groove at the junction of the lower eyelid and the white eyeball. When applying the eye drops, the lower eyelid should be pulled down to expose the small groove. Do not drop the eye drops directly on the cornea (black eye) to avoid Eye irritation.

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Eye drops should be instilled while lying down.After using the eye drops, press the upper part of the nose and the inner corners of the eyes with your fingers for 2 minutes.After taking the medicine, you need to open and close your eyes several times to make the eye drops flow to some organs of the body and flow into the nose, which is easier to absorb, before it may cause harm.In addition, Grokomi, an eye drop used to lower eye pressure, may cause rapid heartbeat and asthma, while other drops may increase blood pressure.

(End of this chapter)