retina vs eye

retina and eye both are nouns.

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

retina (noun)	eye (noun)
the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous 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

retina (verb)	eye (verb)
	look at