central vision vs vision

central vision and vision both are nouns.

Word	Noun	Adjective	Verb	Adverb
central vision	Yes	No	No	No
vision	Yes	No	No	No

As nouns, vision is a hypernym of central vision; that is, vision is a word with a broader meaning than central vision:

central vision: vision using the fovea and parafovea; the middle part of the visual field
vision: the ability to see; the visual faculty

Other hypernyms of central vision include sight, visual modality, visual sense.

central vision (noun)	vision (noun)
vision using the fovea and parafovea; the middle part of the visual field	the ability to see; the visual faculty
	the perceptual experience of seeing
	a vivid mental image
	the formation of a mental image of something that is not perceived as real and is not present to the senses
	a religious or mystical experience of a supernatural appearance