Source : Webster's Revised Unabridged Dictionary (1913)

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

Source : WordNet®

sharp-sighted
     adj 1: having very keen vision; "quick-sighted as a cat" [syn: {argus-eyed},
             {hawk-eyed}, {keen-sighted}, {lynx-eyed}, {quick-sighted},
             {sharp-eyed}]
     2: keenly perceptive or alert; "quick-sighted into the faults
        of the time"- Leonard Bacon [syn: {quick-sighted}, {sharp-eyed}]