JEB -- Ventura et al. 204 (14): 2527 Figure IG1

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Fig. 1. Spectral sensitivity, S( ${lambda}$ ), functions of horizontal cells measured using the constant-response method, with no background. The figure shows an average S( ${lambda}$ ) function of 38 dark-adapted luminosity horizontal cells (filled circles) and the corresponding standard deviations (thin line). (Modified from Fig.4 in Ventura et al., 1999, with permission of Visual Neuroscience.)