Source : Webster's Revised Unabridged Dictionary (1913)

Eyesight \Eye"sight`\, n.
   Sight of the eye; the sense of seeing; view; observation.

         Josephus sets this down from his own eyesight. --Bp.
                                                  Wilkins.

Source : WordNet®

eyesight
     n : normal use of the faculty of vision [syn: {seeing}, {sightedness}]