... fig-ures and correspondent p values are reported.ResultsComparison of gait parameters among the baseline condi-tion (BL), the conditions with continuous optic flow(BOF, FOF) and the condition implying ... mild and severe Parkinson's Disease. Com-parison of gait velocity, stride length and cadence between the baseline condition (BL), the conditions involving optic flow (BOF, FOF) and the condition ... different conditions in controls and subjects with Parkinson's Disease. Comparison of gait velocity, stride length and cadence between the baseline condition (BL), the condition involving...