sharp-sightedness vs visual acuity

sharp-sightedness and visual acuity both are nouns.

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

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

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

Other synonyms of sharp-sightedness include acuity.

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