Mean 10-deg colour matching functions of Stiles and Burch (1959). Primaries at 15500 (645.16), 19000 (526.32) and 22500 (444.44) cm-1 (nm).
CMFs versus wavenumber: from Table 1(5.5.4) of Wyszecki and Stiles (1982).
CMFs versus wavelength: at shorter wavelengths from Table I(5.5.4); but, at longer wavelengths, corrected by Stockman and Sharpe (2000) from the original CMFs (Table 7 of Stiles & Burch, 1959) for rod intrusion (according to the corrections given in Table 8 of Stiles & Burch, 1959) and re-interpolated at 5-nm intervals. See Table 3 of Stockman and Sharpe (2000).
The 10-deg CMFs of Stiles and Burch, like their 2-deg functions, have the advantage over the CIE 2-deg functions in that they were measured directly and thus do not depend on unnecessary photometric assumptions.
The 10-deg CMFs reflect a lower macular pigment density than the 2-deg functions, since macular pigmentation declines with eccentricity. They also reflect a narrowing of the underlying cone spectral sensitivities, since cone outersegments become shorter with increasing eccentricity, thus reducing the axial optical pigment density in the cone outer segment.
Stiles, W. S., & Burch, J. M. (1959). NPL colour-matching investigation: Final report. Optica Acta, 6, 1-26.
Stockman, A., & Sharpe, L. T. (2000). Spectral sensitivities of the middle- and long-wavelength sensitive cones derived from measurements in observers of known genotype. Vision Research, 40, 1711-1737.
Wyszecki, G., & Stiles, W. S. (1982). Color Science: concepts and methods, quantitative data and formulae. (2nd ed.). New York: Wiley.