Where does the term "eye drops" come from? Does it have a profound meaning?

"Eye medicine", a common saying in Beijing dialect, has a derogatory meaning. It refers to someone saying something that has a bad impact on others, especially in front of leaders or the public, saying something "bad" about others. "talk.

Sentence examples,

1. Someone is giving Zhou Shaoning eye drops, saying that he does not want to be Kaifu Li's Backup all the time.

2. What, if you ask the leader to object to his plan again, aren’t you giving yourself eye drops?

3. Your friend is unemployed and divorced. In order to comfort him, you change your MSN signature to: You are unemployed, but someone has also lost his virginity. Your wife divorced you, but she didn't find me either. You call it eye drops for a blind man, you are looking for scolding.