Prereceptoral filters

Macular pigment optical density spectra

0.1 nm steps	1 nm steps	5 nm steps	Bone, Landrum and Cairns (1992) macular pigment density spectrum

Vos (1972)

Wyszecki and Stiles (1967;1982)

Lens density spectra

0.1 nm steps	1 nm steps	5 nm steps	Stockman, Sharpe and Fach (1999) lens density spectrum

Lens densities proposed by Stockman, MacLeod and Johnson (1993)

van Norren and Vos (1974)

Wyszecki and Stiles (1967;1982)

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