Response of the pupil to steady-state retinal illumination: contribution by cones.
Response of the pupil to steady-state retinal illumination was measured in an observer who lacked functioning rods. At high intensities, this response was as great as that of a normal eye. These results cannot be explained by the hypothesis that only rods are receptors for the steady-state response.
D006801:Humans; D009755:Night Blindness; D010786:Photoreceptor Cells / Q000502:physiology*; D011680:Pupil / Q000502:physiology*; D014785:Vision, Ocular / Q000502:physiology*