Adaptation to peripheral flicker

With strict fixation, a flickering disk presented in the peripheral retina rapidly appeared to lose contrast and stop Bickering, owing to adaptation, Subjects measured this adaptation by continually adjusting the flicker amplitude of a peripherally viewed disk to hold it just at threshold, Results: (1) The contrast threshold for flicker increased logarithmically over time, (2) The slope of the temporal decay function increased with eccentricity (1-16 deg) and with decreasing disk size (8 deg-3.6 min are), (3) M-scaling the stimulus size could abolish the dependence upon eccentricity for small disks, but not completely for large disks. (4) The temporal decay rate increased with flicker rate (3-15 Hz), as though each cycle of Bicker elevated contrast threshold equally. Copyright (C) 1996 Elsevier Science Ltd.