#strabismus__squint  abnormal alignment of one or both eyes
  supertype:  #abnormalcy__abnormality__abnormal_condition  an abnormal condition
  subtype:  #cross-eye__crosseye__crossed_eye__crossedeye__convergent_strabismus__esotropia  strabismus in which one or both eyes turn inward toward the nose
  subtype:  #walleye__divergent_strabismus__exotropia  strabismus in which one or both eyes are directed outward

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