Source : Webster's Revised Unabridged Dictionary (1913)

Hawk-eyed \Hawk"-eyed`\, a.
   Having a keen eye; sharpsighted; discerning.

Source : WordNet®

hawk-eyed
     adj : having very keen vision; "quick-sighted as a cat" [syn: {argus-eyed},
            {keen-sighted}, {lynx-eyed}, {quick-sighted}, {sharp-eyed},
            {sharp-sighted}]