Correlations between hMT+ activity in patients during blind field stimulation versus sighted responses in V1 and hMT+ of patients and controls. Average hMT+ signal change during blind hemifield stimulation in patients correlates well with contrast-related activity in V1 of control participants (a) but not with control hMT+ responses (b). Individual data points represent single contrast levels, depicted using a shaded gradient from 1% (pale) to 100% (dark). c, Blind hMT+ activity also correlates with V1 responses to the sighted hemifield in patients' intact hemisphere. This remains significant when the three most distant outliers are excluded from analysis (r = 0.35, p = 0.03). d, There is no significant correlation with contrast-related hMT+ responses to patients' sighted hemifield, which remains unchanged when the three most prominent outliers are excluded (r = 0.19, p = 0.26).