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 is the black hole in the center of the colored part of your eye (iris). The pupil is the pathway that lets light get to your 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 · It's the pupil of the eye. 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 …

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 size of the opening is …

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 definition: 1. a person, especially a child at school, who is being taught: 2. someone who is being taught a…. Learn more.

Oct 30, 2023 · The pupil is the small black circle located in the center of the eyeball. Surrounding the pupil is the colored part of the eye , the iris . The pupil’s function is to allow light to pass …

Aperture within the iris, normally circular, through which light penetrates into the eye. It is located slightly nasally to the centre of the iris. Its diameter can vary from about 2 to 8 mm. It is often …

It includes a significant focus on the non-invasive measurement of the pupil as a clinically important neurological marker of autonomic, midbrain, and central brain function.