acuity

Definition of Acuity in English :

sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)

a quick and penetrating intelligence

Example Sentences:
'he argued with great acuteness'
'I admired the keenness of his mind'

WordNet Lexical Database for English. Princeton University. 2010.

Acuity

noun

1.

keenness or acuteness, esp in vision or thought

2.

the capacity of the eye to see fine detail, measured by determining the finest detail that can just be detected

noun

acuteness; keenness, as of thought or vision

n.

Acuteness of vision or perception; keenness.