central artery of the retina vs eye

central artery of the retina and eye both are nouns.

Word	Noun	Adjective	Verb	Adverb
central artery of the retina	Yes	No	No	No
eye	Yes	No	Yes	No

central artery of the retina (noun)	eye (noun)
a branch of the ophthalmic artery; enters the eyeball with the optic nerve	a small hole or loop (as in a needle)
	the organ of sight
	good discernment (either visually or as if visually)
	attention to what is seen
	an area that is approximately central within some larger region

central artery of the retina (verb)	eye (verb)
	look at