night vision vs scotopic vision

night vision and scotopic vision both are nouns.

Word	Noun	Adjective	Verb	Adverb
night vision	Yes	No	No	No
scotopic vision	Yes	No	No	No

As nouns, night vision and scotopic vision are synonyms defined as:

night vision and scotopic vision: the ability to see in reduced illumination (as in moonlight)

Other synonyms of night vision include night-sight, twilight vision.

night vision (noun)	scotopic vision (noun)
the ability to see in reduced illumination (as in moonlight)	the ability to see in reduced illumination (as in moonlight)