acuity
noun [ U ] formal uk/əˈkjuː.ə.ti/ us/əˈkjuː.ə.t̬i/
（听力、视力、思维等的）灵敏度;敏锐
the ability to hear, see, or think accurately and clearly
Tiredness also affects visual acuity. 疲劳也会影响视敏度。
He was a man of great political acuity. 他是一个对政治高度敏感的人。