eye vs eyeball

eye and eyeball both are nouns.

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

As verbs, eye and eyeball are synonyms defined as:

eye (noun)	eyeball (noun)
a small hole or loop (as in a needle)	the ball-shaped capsule containing the vertebrate eye
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)	eyeball (verb)
look at	look at