The purpose of this paper is to calculate specimen curves which indicate in general how colors shift if a filter is applied. The first section contains the mathematical formulas. The method is used for studying the absorption by the macular pigment (Section II) and by the intraocular media (Section III). The last example (Section IV) refers to the change in illumination from illuminant C to illuminant A and inversely.
© 1950 Optical Society of America
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