Since the media exposed that 90% of eye drops contain preservatives, the industry has been in an uproar, with preservatives being denounced and people talking about “corruption”. The topic of whether preservatives should be added to eye drops has long been a popular topic on Weibo, and there are many different opinions. In the face of all kinds of suspicions, medical experts say: to correctly understand the preservatives. Doubt: Are preservatives dangerous to health? In the concept of many people, preservatives are the enemy of green health. The British Daily Mail also reported that a man from Utah, in order to prove to his friends that preservatives can keep some food “fresh” for a long time, bought a burger in a local fast food restaurant in 1999. Surprisingly, the burger now looks little changed from 14 years ago. Reports such as these are common, and with the media’s spin, preservatives have certainly become “full of evil”. It’s not just the preservatives that keep food from going bad, it has a lot to do with how the food is processed and the local climate. The “preservative” that the netizens are talking about is actually a bacteriostatic agent, which can play a role in inhibiting the reproduction of harmful bacteria, preventing bacteria and mold from producing toxins or multiplying in food to cause disease. In this way, preservatives are essential for food and drug safety. So, why do people think that preservatives are a “beast of burden”? In fact, this is a misunderstanding of the amount of preservatives. Preservatives are not terrible, the real danger lies in the “unruly” use. In response, China has established a comprehensive preparation quality standards for the determination of the content of preservatives and standard limits, the reasonable use of antibacterial agents in eye preparations and quality control have put forward strict requirements. Solve the confusion: eye drops added preservative is necessary eye drops added preservative is necessary? Accordingly, the “Pharmacopoeia of the People’s Republic of China” and the State Food and Drug Administration have issued a statement, known as the prevention of product deterioration, eye drops can be added to the appropriate concentration of preservatives. About this statement, eye drops are divided into two types of single-dose packaging and multi-dose packaging. Generally speaking, multi-dose packaging of eye drops can not be used up immediately after opening. In order to ensure that eye drops are not contaminated by bacteria and microorganisms such as Staphylococcus aureus after opening and to avoid greater harm to patients, the national pharmacopoeia allows the addition of an appropriate amount of antibacterial agent. At the same time, the content of bacteriostatic agents in multi-dose eye drops are very low and not enough to cause damage to the eyes. Moreover, most of the current hospitals and pharmacies sell multi-dose eye drops containing antibacterial agents, and these eye drops sold with antibacterial agents have been clinically used for many years and are proven to be safe. It is understood that the addition of preservatives in eye drops is also a common practice in the United States, Britain, Japan and other developed countries. Conclusion: Correct understanding of preservatives, scientific eye care eye drops in the problem of preservatives is actually a cliché, which on the one hand reflects the concern for health issues, on the other hand, also reveals the misunderstanding of preservatives. The author would like to call on everyone to understand preservatives correctly and take care of your eyes scientifically.