April 1993
Volume 34, Issue 5
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Articles  |   April 1993
Quantitative evaluation of saccadic and smooth pursuit eye movements. Is it reliable?
Author Affiliations
  • M Versino
    Istituto Neurologico Fondazione C. Mondino, Pavia, Italy.
  • G Castelnovo
    Istituto Neurologico Fondazione C. Mondino, Pavia, Italy.
  • R Bergamaschi
    Istituto Neurologico Fondazione C. Mondino, Pavia, Italy.
  • A Romani
    Istituto Neurologico Fondazione C. Mondino, Pavia, Italy.
  • G Beltrami
    Istituto Neurologico Fondazione C. Mondino, Pavia, Italy.
  • D Zambarbieri
    Istituto Neurologico Fondazione C. Mondino, Pavia, Italy.
  • V Cosi
    Istituto Neurologico Fondazione C. Mondino, Pavia, Italy.
Investigative Ophthalmology & Visual Science April 1993, Vol.34, 1702-1709. doi:
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      M Versino, G Castelnovo, R Bergamaschi, A Romani, G Beltrami, D Zambarbieri, V Cosi; Quantitative evaluation of saccadic and smooth pursuit eye movements. Is it reliable?. Invest. Ophthalmol. Vis. Sci. 1993;34(5):1702-1709.

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

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Abstract

PURPOSE: The authors evaluated the reliability of the coefficients of the (1) amplitude/duration and (2) amplitude/peak velocity relationships of the mean precision values and the mean latency values (saccadic eye movements) and the coefficients of the target velocity/gain relationship (smooth pursuit eye movements). They computed test-retest maximum variability limits for these parameters. METHODS: After a 1-week interval, saccadic and smooth pursuit eye movements were recorded twice from 20 healthy subjects; 12 of these subjects underwent a third recording session. The estimate of the intraclass coefficient of reliability, R, was adopted to evaluate the reliability of eye movement quantitative analysis. RESULTS: The data demonstrated that the reliability was fairly good for the amplitude/peak velocity relationship, was good for the precision, and was excellent for the amplitude/duration, the target velocity/gain relationships, and the latency. CONCLUSIONS: Quantitative analysis of both saccadic and smooth pursuit eye movements is reliable. One statistic used to estimate reliability, ie, the within-subjects mean square value, also enables the determination of test-retest normal variability values for both the variances and the differences of measurements.

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