The relationship between the LLE and the ratio d in cases of (a)–(c) P = 1.0 and (d)–(f) P = 0.5. The parameters C and P are the mean of amplitude relaxation rate and the ratio of the neurons being sensitive to light information, respectively. The coupling strength g is 0.04 in panels (a)–(c) and 0.08 in panels (d)–(f). The dotted pink lines indicate the trough d_c of the LLE and dashed green lines represent d = 1, respectively.