Emmetropia /(ĕm"mē̇*trō"pĭ*ȧ)/

Em·me·tro·pi·a

Emmetropia

n.
  1. That refractive condition of the eye in which the rays of light are all brought accurately and without undue effort to a focus upon the retina; -- opposed to hypermetropia, myopia, and astigmatism. (Med.)