December 1995
Volume 36, Issue 13
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Articles  |   December 1995
Conjugacy of eyelid movements in vertical eye saccades.
Author Affiliations
  • R J Wouters
    Department of Oculoplastic Surgery, Rotterdam Eye Hospital, The Netherlands.
  • W A van den Bosch
    Department of Oculoplastic Surgery, Rotterdam Eye Hospital, The Netherlands.
  • T Stijnen
    Department of Oculoplastic Surgery, Rotterdam Eye Hospital, The Netherlands.
  • A C Bubberman
    Department of Oculoplastic Surgery, Rotterdam Eye Hospital, The Netherlands.
  • H Collewijn
    Department of Oculoplastic Surgery, Rotterdam Eye Hospital, The Netherlands.
  • H G Lemij
    Department of Oculoplastic Surgery, Rotterdam Eye Hospital, The Netherlands.
Investigative Ophthalmology & Visual Science December 1995, Vol.36, 2686-2694. doi:
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    • Get Citation

      R J Wouters, W A van den Bosch, T Stijnen, A C Bubberman, H Collewijn, H G Lemij; Conjugacy of eyelid movements in vertical eye saccades.. Invest. Ophthalmol. Vis. Sci. 1995;36(13):2686-2694.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

PURPOSE: To examine the conjugacy of lid saccades in normal subjects. METHODS: Saccades of both upper eyelids were recorded simultaneously by means of small, lightweight, magnetic search coils, fixed on each lid. Subjects then made vertical eye saccades between fixed targets. The associated eye saccades were recorded simultaneously by means of magnetic search coils. The authors further examined whether the position of the lid coils affected the recordings. RESULTS: Lid saccades were not as conjugate as their associated eye saccades. Nonconjugacy of lid saccades averaged approximately 8% of the target amplitude, irrespective of saccadic direction. By contrast, nonconjugacy of the associated eye saccades averaged approximately 1% of the target amplitude. Coil position significantly (P < 0.05) affected the recordings. CONCLUSIONS: Lid saccades are not as conjugate as their associated eye saccades. Coil position is critical for the recordings of lid saccades.

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