field of view vs visual percept

field of view and visual percept both are nouns.

Word	Noun	Adjective	Verb	Adverb
field of view	Yes	No	No	No
visual percept	Yes	No	No	No

As nouns, visual percept is a hypernym of field of view; that is, visual percept is a word with a broader meaning than field of view:

field of view: the area that is visible (as through an optical instrument)
visual percept: a percept that arises from the eyes; an image in the visual system

Other hypernyms of field of view include visual image.

field of view (noun)	visual percept (noun)
the area that is visible (as through an optical instrument)	a percept that arises from the eyes; an image in the visual system