Pronounced differences of sustained index between ON and OFF cells. A, Size tuning of sustained index for ON and OFF cells to the onset of same-polarity stimuli for all cells (left, 93 ON, 75 OFF), X cells (middle, 73 ON, 52 OFF), and Y cells (right, 20 ON, 23 OFF) in dLGN. B, Size tuning of the sustained index for ON- (N = 26) and OFF-RGCs (N = 22) to the onset of same-polarity stimuli. C, D, Same as in A, B, but to the offset of opposite-polarity stimuli. E, Population PSTHs for dLGN (top) and RGCs (bottom) from 700 to 1000 ms after the offset of opposite-polarity stimuli of different diameters. Dotted line indicates baseline firing. F, Size tuning of the final 300 ms of the response for all cells (left, 67 ON, 57 OFF), X cells (middle, 49 ON, 36 OFF), and Y cells (right, 18 ON, 21 OFF) in the dLGN. G, Size tuning of the final 300 ms of the response for ON- (N = 21) and OFF-RGCs (N = 15). *p < 0.05. **p < 0.01. ***p < 0.001.