The Collaborative International Dictionary of English v.0.48:

Eyesight \Eye"sight`\, n.
   Sight of the eye; the sense of seeing; view; observation.
   [1913 Webster]

         Josephus sets this down from his own eyesight. --Bp.
                                                  Wilkins.
   [1913 Webster]

WordNet (r) 3.0 (2006):

eyesight
    n 1: normal use of the faculty of vision [syn: eyesight,
         seeing, sightedness]

Moby Thesaurus II by Grady Ward, 1.0:

57 Moby Thesaurus words for "eyesight":
   clear sight, color vision, command, cone vision, day vision,
   daylight vision, discernment, domination, eye, eye-mindedness,
   eyereach, eyeshot, farsight, farsightedness, field of view,
   field of vision, horizon, keen sight, ken, limit of vision,
   line of sight, naked eye, night vision, outlook, outlook over,
   perception, peripheral field, peripheral vision, perspective,
   perspicacity, perspicuity, photopia, power of sight, prospect,
   purview, quick sight, range, rod vision, scan, scope,
   scope of vision, scotopia, seeing, sense of sight, sight,
   sightedness, sightliness, survey, sweep, twilight vision,
   unobstructed vision, view, vision, vista, visual acuity,
   visual field, visual sense