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Heterogeneous fluctuation versus contrast sensitivity. Left: results for young control subjects: top, size III stimuli with four reversals; middle, Gabor patches with four reversals; bottom, Gabor patches with eight reversals. Right: results for patients and older control subjects: top, size III on the HFA; bottom, Gabor with six-reversal staircases. Lines show results of linear regression. Symbols have been jittered by up to 0.05 log unit, to show overlapping data points.
