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CRS Research topics menu Suppressed synkinetic blinks accompanying saccades: an apparent artefact
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Chris Timms & Peter West
Moorfields Eye Hospital, London, UK & Cambridge Research Systems Ltd, UK

A paper given by Chris Timms and Peter West, at the International Strabismological Association meeting which is attached to World Ophthalmology Congress in São Paulo, Brazil.

  • Conclusion: In normal subjects, saccadic overshoot ‘artefact’ is a real eye movement associated with the programming of a blink during a saccade even if the actual lid movement is suppressed.
Typical saccades showing the overshoot artifact

  • The saccade apparently overshoots the target and is followed by a short (10 -15 msec) backwards jump before final fixation.
  • It is too rapid to be a visually guided corrective saccade
  • The amplitude of the oscillation appears to be independent of amplitude of the saccade
  • Appears on both centripetal and centrifugal saccades

 

Typical centrifugal saccade

 

 

Typical centripetal saccade

 

 

Vertical and horizontal eye position

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