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

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.

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 muscles of the …

A pupil is one under the close supervision of a teacher, either because of youth or of specialization in some branch of study: a grade-school pupil; the pupil of a famous musician.

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 © Cambridge …

The pupil’s primary function is to control the amount of light entering the eye, ensuring optimal visual performance under varying light conditions. Its ability to adjust in size is key to maintaining vision …

n. The apparently black circular opening in the center of the iris of the eye, through which light passes to the retina. [Middle English, from Old French pupille, from Latin pūpilla, little doll, pupil of the eye …

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 the retina to …