sharp-sightedness

from WordNet (r) 3.0 (2006)

sharp-sightedness
    n 1: sharpness of vision; the visual ability to resolve fine
         detail (usually measured by a Snellen chart) [syn:
         {acuity}, {visual acuity}, {sharp-sightedness}]
    2: lively attentiveness [syn: {alertness}, {sharp-sightedness},
       {on the qui vive}]

from The Collaborative International Dictionary of English v.0.48

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

[email protected]