A post says
Bureaucratese is an informal term for obscure speech or writing that is typically characterized by verbosity, euphemisms, jargon, and buzzwords. Also known as officialese, corporate-speak, and government-speak. Contrast with plain English.
as per another post, "Jargon" is the opposite of "Plain English"
special words and phrases that are used by particular groups of people, especially in their work
In the field of medical, people would use the phrase "ophthalmic diseases" to refer to "eye diseases".
Is my understanding (the following) correct?
"ophthalmic diseases" is some kind of Jargon, while "eye diseases" is a kind of Plain English.