#eye_condition__eyecondition  the condition of the optical properties of the eye
  supertype:  condition.state__status  a condition or state at a particular time: "a condition (or state) of disrepair"; "the current status of the arms negotiations"
  subtype:  anisometropia  difference in the refractive power of the two eyes
  subtype:  isometropia  equality of refractive power in the two eyes

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