May 1989
Volume 30, Issue 5
Free
Articles  |   May 1989
How normal are "normal" square wave jerks?
Author Affiliations
  • J Shallo-Hoffmann
    Department of Strabismology and Neuroophthalmology, University of Göttingen, Federal Republic of Germany.
  • J Petersen
    Department of Strabismology and Neuroophthalmology, University of Göttingen, Federal Republic of Germany.
  • H Mühlendyck
    Department of Strabismology and Neuroophthalmology, University of Göttingen, Federal Republic of Germany.
Investigative Ophthalmology & Visual Science May 1989, Vol.30, 1009-1011. doi:
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    • Get Citation

      J Shallo-Hoffmann, J Petersen, H Mühlendyck; How normal are "normal" square wave jerks?. Invest. Ophthalmol. Vis. Sci. 1989;30(5):1009-1011.

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Abstract

Fifty normally sighted young subjects underwent horizontal electro-oculographic (EOG) examination to investigate fixation stability of the saccadic system. The number of square wave jerks (SWJ) and saccades per minute were calculated in three clinically used test conditions: (1) with a fixation point; (2) in darkness; and (3) with eyes closed. SWJ were recorded in all conditions. The highest number of SWJ per minute were found in darkness and with closed eyes. The analysis of the findings shows a range of normalcy for these three clinically used EOG conditions from which pathology can be inferred.

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