Noun
sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)
a quick and penetrating intelligence
Source: WordNetMental acuity was never born from comfortable circumstances. Haruki Murakami
John Ashcroft is not a friend of liberty and justice. George Bush, the appointed president, is not someone who ---prior to a month ago--- ever demonstrated any insight or acuity about the world around him. Have these men been born again, again? Jeffrey Montgomery
he argued with great acuteness Source: Internet
I admired the keenness of his mind Source: Internet
As is the case with many birds of prey, falcons have exceptional powers of vision; the visual acuity of one species has been measured at 2.6 times that of a normal human. Source: Internet
Gullit thus combined physical presence with flair, mental acuity, formidable technique, and natural touch, to become an iconic figure in world football. Source: Internet