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 …

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.

Apr 22, 2025 · The pupil is the opening located in the center of the iris of the eye. It controls the amount of light that enters the eye so that you can see clearly. The pupil size is controlled by …

pupil, in the anatomy of the eye, the black centre opening within the iris through which light passes before reaching the lens and being focused onto the retina.

The meaning of PUPIL is a child or young person in school or in the charge of a tutor or instructor : student.

Feb 26, 2019 · The pupil is the opening in the center of the iris (the structure that gives our eyes their color). The function of the pupil is to allow light to enter the eye so it can be focused on …

pupil noun [C] (EYE PART) the circular, black area in the center of the eye that gets larger and smaller and lets in light (Definition of pupil from the Cambridge Academic Content Dictionary © …

Oct 30, 2023 · Structure of the eyeball seen in a transverse section. The pupil is the small black circle located in the center of the eyeball. Surrounding the pupil is the colored part of the eye, …

Jul 6, 2023 · Learn about the dark openings at the center of your eyes called pupils, how they react to light, and what changes in pupil size and shape can indicate about your health.

The pupil is the central opening of the iris, shaped by the circular muscle and bordered by the pupillary margin, which regulates the amount of light entering the inner structures of the eye.