The pupil is the black opening in the middle of the colored part of your eye (iris). The pupil gets bigger or smaller in response to changes in light. Muscles in the iris control the size of the pupil. Pupil issues can suggest certain diseases.

The pupil is a hole located in the center of the iris of the eye that allows light to strike the retina. [1] It appears black because light rays entering the pupil are either absorbed by the tissues inside the eye directly, or absorbed after diffuse reflections within the eye that mostly miss exiting the narrow pupil. [citation needed]

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 the retina to begin the process of sight.

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

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 governed by the muscles of the iris, the coloured part of …

Mar 25, 2025 · A pupil is the opening created by the iris, which widens and narrows to control the amount of light that enters the eye. Pupil size can vary between people, but they should be round, equal in size, and contract or dilate at the same time.

3 days ago · 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. When the room is lighted, there is an immediate constriction of the pupils, the light reflex.

Jan 22, 2025 · The pupil is the black, circular opening in the center of the eye that allows light to enter and reach the retina. It appears black because most of the light entering the pupil is absorbed by the tissues inside the eye.

Oct 30, 2023 · The pupil’s function is to allow light to pass through and enter the eye. This light then interacts with the cells of the retina, working as part of the visual pathway to provide the …