visual acuity vs acuity

visual acuity and acuity both are nouns.

Word	Noun	Adjective	Verb	Adverb
visual acuity	Yes	No	No	No
acuity	Yes	No	No	No

As nouns, visual acuity and acuity are synonyms defined as:

visual acuity and acuity: sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)

Other synonyms of visual acuity include sharp-sightedness.

visual acuity (noun)	acuity (noun)
sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)	a quick and penetrating intelligence
	sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)