Source : Webster's Revised Unabridged Dictionary (1913)

Farsightedness \Far"sight`ed*ness\, n.
   1. Quality of bbeing farsighted.

   2. (Med.) Hypermetropia.

Source : WordNet®

farsightedness
     n : abnormal condition in which vision for distant objects is
         better than for near objects [syn: {hyperopia}, {hypermetropia},
          {hypermetropy}, {longsightedness}] [ant: {myopia}]