Pupil size in people with synesthesia changed depending on how bright or dark the perceived colors were. The pupil of your eye, the black hole in your iris, works with the lens to send light to the retina, where it becomes electrical signals sent on to the brain through the optic nerve. In optical terms, the anatomical pupil is the eye's aperture and the iris is the aperture stop.
The image of the pupil as seen from outside the eye is the entrance pupil, which does not exactly correspond to the location and size of the physical pupil because it is magnified by the cornea. The amount of light entering the eye is restricted by the aperture in the iris, the pupil. In a dark room, a person’s pupils are large, perhaps 8 mm (0.3 inch) or more in diameter. The pupil controls how much light enters the eye, allowing for clear vision.
pupil constricting, In low light, pupils widen to let in more light, and in bright light, they narrow to prevent too much light from entering. Pupils are the dark-colored openings at the center of your eyes that let light in. Doctors can look at your pupils for clues about your health. The size of your pupils and how they react to... The pupil is the opening in the center of the iris (the structure that gives our eyes their color).
pupil constricting, The function of the pupil is to allow light to enter the eye so it can be focused on the retina to begin the process of sight. The meaning of PUPIL is a child or young person in school or in the charge of a tutor or instructor : student.
