title: Are there any left-right asymmetries in saccade parameters? Examination of latency, gain, and peak velocity.
abstract: OBJECTIVE
  Hemispheric specialization in saccadic control is still under debate. Here we examine the latency, gain, and peak velocity of reactive and voluntary leftward and rightward saccades to assess the respective roles of eye and hand dominance.
  
  
  METHODS
  Participants with contrasting hand and eye dominance were asked to make saccades toward a target displayed at 5°, 10°, or 15° left or right of the central fixation point. In separate sessions, reactive and voluntary saccades were elicited by Gap-200, Gap-0, Overlap-600, and Antisaccade procedures.
  
  
  RESULTS
  Left-right asymmetries were not found in saccade latencies but appeared in saccade gain and peak velocity. Regardless of the dominant hand, saccades directed to the ipsilateral side relative to the dominant eye had larger amplitudes and faster peak velocities.
  
  
  CONCLUSIONS
  Left-right asymmetries can be explained by naso-temporal differences for some subjects and by eye dominance for others. Further investigations are needed to examine saccadic parameters more systematically in relation to eye dominance. Indeed, any method that allows one to determine ocular dominance from objective measures based on saccade parameters should greatly benefit clinical applications, such as monovision surgery.
authors.affiliation: Laboratoire Vision Action Cognition Institut Universitaire Paris Descartes de Psychologie, Université Paris Descartes, Sorbonne Paris Cité, Institut de Psychologie, Boulogne Billancourt, France. dorine.vergilino-perez@parisdescartes.fr
authors.forename: Dorine
authors.initials: D
authors.lastname: Vergilino-Perez
authors.forename: Alexandra
authors.initials: A
authors.lastname: Fayel
authors.forename: Christelle
authors.initials: C
authors.lastname: Lemoine
authors.forename: Patrice
authors.initials: P
authors.lastname: Senot
authors.forename: Judith
authors.initials: J
authors.lastname: Vergne
authors.forename: Karine
authors.initials: K
authors.lastname: Doré-Mazars
mesh_terms: D004292:Dominance, Cerebral / Q000502:physiology*; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology*; D006801:Humans; D008297:Male; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology*; D012438:Saccades / Q000502:physiology*; D011795:Surveys and Questionnaires; D055815:Young Adult