optic vs lens

optic and lens both are nouns.

Word	Noun	Adjective	Verb	Adverb
optic	Yes	Yes	No	No
lens	Yes	No	No	No

optic (noun)	lens (noun)
the organ of sight	a transparent optical device used to converge or diverge transmitted light and to form images
	electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons
	biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focus light on the retina
	(metaphor) a channel through which something can be seen or understood

optic (adjective)	lens (adjective)
of or relating to or resembling the eye
relating to or using sight