vena ophthalmica vs ophthalmic vein

vena ophthalmica and ophthalmic vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena ophthalmica	Yes	No	No	No
ophthalmic vein	Yes	No	No	No

As nouns, vena ophthalmica and ophthalmic vein are synonyms defined as:

vena ophthalmica and ophthalmic vein: either of two veins that serve the eye; empties into the cavernous sinus

vena ophthalmica (noun)	ophthalmic vein (noun)
either of two veins that serve the eye; empties into the cavernous sinus	either of two veins that serve the eye; empties into the cavernous sinus