eye vs visual system

eye and visual system both are nouns.

Word	Noun	Adjective	Verb	Adverb
eye	Yes	No	Yes	No
visual system	Yes	No	No	No

eye (noun)	visual system (noun)
a small hole or loop (as in a needle)	the sensory system for vision
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)	visual system (verb)
look at