Abstract
We investigated the relationship between stimulus duration and flicker thresholds when flickering stimuli were presented on luminance pedestals. Mean-modulated flicker thresholds remained constant with changes in stimulus duration. However, flicker presented on a luminance pedestal gave masking at short durations, decaying exponentially to stable thresholds with time. These stable thresholds were elevated when compared with the mean-modulated condition. The lowest threshold in a stimulus onset asynchrony function predicted the threshold obtained from a luminance-pedestal flicker stimulus of the same duration. This suggests that luminance-pedestal flicker thresholds are determined by the most detectable cycle in a multiple cycle stimulus. We find that the 800 ms stimulus duration used in the Medmont M600 perimeter (Medmont, Camberwell, Australia) is suitable to determine stable flicker thresholds.
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