The threshold gradients of the rods and the cones; in the dark-adapted and in the partially light-adapted eye.
D003118:Color Perception; D055253:Color Vision; D003623:Dark Adaptation; D009755:Night Blindness; D017949:Retinal Cone Photoreceptor Cells; D014785:Vision, Ocular
COLOR VISION; NIGHT BLINDNESS; VISION