eye vs center stage

eye and center stage both are nouns.

Word	Noun	Adjective	Verb	Adverb
eye	Yes	No	Yes	No
center stage	Yes	No	No	No

As nouns, center stage is a hyponym of eye; that is, center stage is a word with a more specific, narrower meaning than eye:

eye (noun)	center stage (noun)
a small hole or loop (as in a needle)	the central area on a theater stage
the organ of sight	a position of prominence or importance
good discernment (either visually or as if visually)
attention to what is seen
an area that is approximately central within some larger region

eye (verb)	center stage (verb)
look at