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The reliability of eye movement quantitative evaluation. I. Saccadic eye movements
M Versino1, G Castelnovo, R Bergamaschi
1Instituto Neurologico C. Mondino, Università di Pavia.
Summary
The reliability of saccadic eye movement analysis was assessed using intraclass correlation coefficient (R). The amplitude/duration relationship showed very good reliability, making it suitable for neurophysiological studies.
Area of Science:
- Neuroscience
- Ophthalmology
- Biomedical Engineering
Background:
- Quantitative analysis of saccadic eye movements is crucial in neurophysiological research.
- Assessing the reliability of saccade parameters is essential for accurate longitudinal studies.
Purpose of the Study:
- To evaluate the reliability of quantitative analysis of saccadic eye movements.
- To determine the most reliable saccade parameters for neurophysiological studies.
Main Methods:
- Intraclass coefficient of reliability (R) was used to assess reliability.
- Refixative saccadic eye movements were recorded twice from 15 healthy subjects at a one-week interval using binocular electrooculography.
- Reliability was computed for amplitude/duration and amplitude/peak velocity relationships, precision, and latency values.
Main Results:
- Reliability was very good for the amplitude/duration relationship.
- Reliability was good for precision values.
- Reliability was fairly good for the amplitude/peak velocity relationship.
Conclusions:
- The amplitude/duration relationship and precision offer reliable saccade parameters for neurophysiological studies.
- Normal variability values obtained can be used in longitudinal studies of both normal and pathological conditions.
- Careful selection of reliable parameters and appropriate variability computation strategies is recommended for clinical applications.