'Sharp-sightedness' definitions:

Definition of 'sharp-sightedness'

From: WordNet
noun
Sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart) [syn: acuity, visual acuity, sharp-sightedness]
noun
Lively attentiveness [syn: alertness, sharp-sightedness, on the qui vive]

Definition of 'Sharp-sightedness'

From: GCIDE
  • Sharp-sighted \Sharp"-sight`ed\, a. Having quick or acute sight; -- used literally and figuratively. -- Sharp`-sight`ed*ness, n. [1913 Webster]