The Collaborative International Dictionary of English v.0.48:

amblyopia \am`bly*o"pi*a\ ([a^]m`bl[-e]*[=o]"p[-e]*[.a]),
amblyopy \am"bly*o`py\ ([a^]m"bl[-e]*[=o]`p[y^]), n. [Gr.
   'amblywpi`a; 'ambly`s blunt, dim + 'w`ps eye: cf. F.
   amblyopie.] (Med.)
   Weakness of sight, without any detectable organic lesion.
   [1913 Webster + AS]