visual acuity vs sharp-sightedness

visual acuity and sharp-sightedness both are nouns.

Word	Noun	Adjective	Verb	Adverb
visual acuity	Yes	No	No	No
sharp-sightedness	Yes	No	No	No

As nouns, visual acuity and sharp-sightedness are synonyms defined as:

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

Other synonyms of visual acuity include acuity.

visual acuity (noun)	sharp-sightedness (noun)
sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)	lively attentiveness
	sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)