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The averaged 1st harmonic amplitudes (impulse per second, first harmonics) of MC cell responses with the isolated rod stimuli (circles), isolated cone stimuli (squares), and combined rod and cone stimuli (triangles) at 0.2, 2, 20, and 200 td. (A) Temporal frequency response function measured at 55% contrast. (B) Contrast response function measured at 4.88 Hz (the lines are fits of the Michaelis–Menten equation). Error bars are standard errors.
