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. Author manuscript; available in PMC: 2008 Mar 1.
Published in final edited form as: Vision Res. 2007 Feb 22;47(7):946–954. doi: 10.1016/j.visres.2006.12.015

Figure 3.

Figure 3

Post-stimulus, sustained pupillary responses of macaques under normal conditions and during pharmacological blockade. (A) Retinal irradiance-pupillary response plots under normal conditions. (B) Retinal irradiance-pupillary response plots after pharmacological blockade. In both A and B, the white dotted line indicates the retinal irradiance at 470 nm required to produce half-maximal pupilloconstriction, line color represents an approximation of stimulus wavelength, and Pmax = 3.0 mm was used for fitting the Hill equations. (C) Spectral sensitivity data derived from panels A and B. The solid curve, a Vitamin A1 pigment nomogram with peak sensitivity at 482 nm, closely matches the data obtained both under normal conditions (▲, R2 = 0.98) (Best fit λmax 483 nm) and during pharmacological blockade (●, R2 = 0.97) (Best fit: λmax 476 nm).