Post-stimulus responses are faster for OFF cells than for ON cells. A, Normalized PSTH of the first 120 ms for dLGN ON and OFF cells (left) and RGCs (right) to the onset of same-polarity stimuli. B, Size tuning of response latencies for dLGN ON and OFF cells (left, 86 ON, 62 OFF) and RGCs (right, 25 ON, 21 OFF) to the onset of same-polarity stimuli. C, Size tuning of response latencies for X (left, 71 ON, 46 OFF) and Y cells (right, 15 ON, 16 OFF). D, Same as in A, but for opposite-polarity stimulus offset. E, Same as in B, but for opposite-polarity stimulus offset. F, Same as in C, but for opposite-polarity stimulus offset. *p < 0.05. **p < 0.01.