Acuity - Definition

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