em·me·trop·ic /-ˈtrɑpɪk, ˈtrop-/ 形容詞
  屈光正常的,正視眼的
  Em·me·trop·ic a. Pertaining to, or characterized by, emmetropia.
     The normal or emmetropic eye adjusts itself perfectly for all distances.   --J. Le Conte.
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  emmetropic
       adj : of or relating to the normal condition of the eye in which
             visual images are in clear focus on the retina [ant: ametropic]