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The purpose of this study was to determine which test conditions are appropriate for clinical examination of predictive control ability in smooth pursuit eye movements (SPEM). A combination of sinusoidal and pseudorandom target motion was employed to examine SPEM. Pseudorandom waves were generated by summing sinusoidal components spaced at 0.05 Hz intervals over three frequency ranges: 0.05 to 0.5 Hz, 0.05 to 1 Hz and 0.05 to 1.5 Hz. The peak amplitude of the resultant target waveform was set at 30 degrees. Testing was performed with 8 normal subjects. The results indicate a SPEM gain of 0.9 for 0.05-0.5 Hz, 0.7 for 0.05-1 Hz and 0.3 for 0.05-1.5 Hz. It is concluded that the pseudorandom wave of 0.05 to 1 Hz in frequency range is most suitable for clinical use.
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