lens of the eye vs eye

lens of the eye and eye both are nouns.

Word	Noun	Adjective	Verb	Adverb
lens of the eye	Yes	No	No	No
eye	Yes	No	Yes	No

lens of the eye (noun)	eye (noun)
biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focus light on the retina	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

lens of the eye (verb)	eye (verb)
	look at