a ‧ cu ‧ i ‧ ty /əˈkjuːəti, əˈkjuːɪti/ BrE AmE noun [uncountable] formal
[ Date: 1500-1600 ; Language: French ; Origin: acuité , from Old French , from agu 'sharp' , from Latin acutus ; ⇨ ↑ acute ]
the ability to think, see, or hear clearly:
A motorist needs good visual acuity.