title: Smooth pursuit eye movements in children with strabismus and in children with vergence deficits.
abstract: OBJECTIVE
  The objective of our study was to examine horizontal smooth pursuit performance in strabismic children and in children with vergence deficits, and to compare these data with those recorded in a group of control age-matched children.
  
  
  METHODS
  Binocular eye movements were recorded by video-oculography in ten strabismic children (mean age: 9.8±0.8) and seven children with vergence deficits (mean age: 10.8±0.6). Data were compared to that of age-matched control children (mean age: 9.8±0.8 years).
  
  
  RESULTS
  Catch-up saccades amplitude in strabismic children and in children with vergence deficits were significantly higher than in control age-matched children. Moreover, in strabismic children the amplitude of catch-up saccades was significantly higher in rightward than in leftward direction. The number of catch-up saccades was also significantly higher in rightward than in leftward direction. The gain value of pursuits in rightward direction was significantly higher in the right eye than in the left one; for the right eye, the gain value was significantly higher in rightward than in leftward direction. Binocular coordination of pursuit was better in control age-matched children than in children with vergence deficits and than in strabismic children.
  
  
  CONCLUSIONS
  Binocular coordination of pursuit is abnormal in children with vergence deficits and worse in strabismic children. Binocular vision plays an important role in improving binocular coordination of pursuit.
authors.affiliation: Unité Mixte de Recherche 676 Inserm - Université Paris Diderot, Hôpital Robert Debré, Paris, France.
authors.forename: Cynthia
authors.initials: C
authors.lastname: Lions
authors.affiliation: Service d'Ophtalmologie, Hôpital Robert Debré, Paris, France.
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Bui-Quoc
authors.affiliation: Vestibular and Oculomotor Evaluation Unit, ORL Department, Robert Debré Hospital, Paris, France.
authors.forename: Sylvette
authors.initials: S
authors.lastname: Wiener-Vacher
authors.affiliation: e(ye)BRAIN, Ivry-sur-Seine, France.
authors.forename: Magali
authors.initials: M
authors.lastname: Seassau
authors.affiliation: Unité Mixte de Recherche 676 Inserm - Université Paris Diderot, Hôpital Robert Debré, Paris, France.
authors.forename: Maria Pia
authors.initials: MP
authors.lastname: Bucci
mesh_terms: D000293:Adolescent; D002648:Child; D003290:Convergence, Ocular / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D011698:Pursuit, Smooth; D012438:Saccades; D013285:Strabismus / Q000503:physiopathology*; D015348:Vision, Binocular / Q000502:physiology