The wavelength variation of the directional sensitivity of the Stiles pi1(mu).
D000328:Adult; D003117:Color Vision Defects / Q000503:physiopathology*; D006801:Humans; D008954:Models, Biological; D010775:Photic Stimulation / Q000379:methods; D010786:Photoreceptor Cells / Q000502:physiology*; D011603:Psychophysiology; D011680:Pupil; D012684:Sensory Thresholds