The sharpness or keenness of thought, vision, or hearing; in a scientific context, it can refer to the ability to differentiate between fine details.

विचार, दृष्टि, या श्रवण की तीव्रता।

English Usage: The doctor tested her visual acuity using an acuity grating.

Hindi Usage: डॉक्टर ने उसके दृष्टि की तीव्रता का परीक्षण एक acuity grating का उपयोग करके किया।