Source : Webster's Revised Unabridged Dictionary (1913)

Amblyopia \Am`bly*o"pi*a\, Amblyopy \Am"bly*o`py\, n. [Gr. ?; ?
   blunt, dim + ? eye: cf. F. amblyopie.] (Med.)
   Weakness of sight, without and opacity of the cornea, or of
   the interior of the eye; the first degree of amaurosis.

Source : WordNet®

amblyopia
     n : visual impairment without apparent organic pathology