Acuity

n.

1.

Sharpness or acuteness, as of a needle, wit, etc.

Noun	1.	acuity - sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart) Synonyms: sharp-sightedness, visual acuity
	2.	acuity - a quick and penetrating intelligence; "he argued with great acuteness"; "I admired the keenness of his mind" Synonyms: acuteness, keenness, sharpness

acridity, acumen, acumination, acuteness, adroitness, agility, alertness, apperception, aptitude, aptness, astuteness, attention, attentiveness, braininess, brightness, brilliance, clear thinking, cleverness, cogency, dexterity, discernment, edge, esprit, farseeingness, farsightedness, flair, foresight, foresightedness, genius, giftedness, gifts, incisiveness, insight, keen-wittedness, keenness, longheadedness, longsightedness, mental alertness, mercurial mind, mucronation, native cleverness, nimble mind, nimble-wittedness, nimbleness, nous, penetration, perception, perceptiveness, percipience, perspicaciousness, perspicacity, perspicuity, perspicuousness, pointedness, prickliness, promptitude, promptness, providence, punctuality, quick parts, quick thinking, quick wit, quick-wittedness, quickness, readiness, ready wit, sagaciousness, sagacity, savvy, sensibility, sharp-wittedness, sharpness, sleeplessness, smartness, smarts, spinosity, sprightly wit, talent, thorniness, trenchancy, wakefulness