field of vision vs visual field

field of vision and visual field both are nouns.

Word	Noun	Adjective	Verb	Adverb
field of vision	Yes	No	No	No
visual field	Yes	No	No	No

As nouns, field of vision and visual field are synonyms defined as:

field of vision and visual field: all of the points of the physical environment that can be perceived by a stable eye at a given moment

Other synonyms of field of vision include field of regard.

field of vision (noun)	visual field (noun)
all of the points of the physical environment that can be perceived by a stable eye at a given moment	all of the points of the physical environment that can be perceived by a stable eye at a given moment