eye vs retina

eye and retina both are nouns.

Word	Noun	Adjective	Verb	Adverb
eye	Yes	No	Yes	No
retina	Yes	No	No	No

eye (noun)	retina (noun)
a small hole or loop (as in a needle)	the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve
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

eye (verb)	retina (verb)
look at