Definition & Meaning of "four eyes"in English

What is the origin of the term "four eyes" and how is it used?

"Four eyes" is a slang term that dates back to at least the 19th century, originating from the literal visual image of someone wearing glasses, which makes it look as if they have an extra pair of eyes. It became popular in schoolyards and informal speech as a way to tease or single out people who wear spectacles. The term is derogatory when used to mock or bully, but it is mild compared with more aggressive insults and sometimes appears humorously in media or self-reference. Its offensiveness depends heavily on context and tone.