Pupil - Wikipedia
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 …
Pupil of the Eye: Definition, Anatomy & Function
Small pupils can happen when you’ve had a stroke or when you’ve used opiates, among other reasons. Mydriasis is the name of the opposite condition, having dilated pupils.
Pupil Function and Disorders That Affect It - Verywell Health
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 …
Your Pupils and Eye Disorders, Nerve Problems, Concussion - WebMD
Dec 4, 2024 · 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 …
Pupil | Iris, Optic Nerve & Retina | Britannica
The pupils of the eyes expand or contract according to the intensity of light. The vertical slit shape allows for a more precise control over the amount of light entering the eye. In low-light …
Pupil - Definition and Detailed Illustration - All About Vision
Feb 26, 2019 · Typically, the pupils appear perfectly round, equal in size and black in color. The black color is because light that passes through the pupil is absorbed by the retina and is not …
PUPIL Definition & Meaning - Merriam-Webster
The meaning of PUPIL is a child or young person in school or in the charge of a tutor or instructor : student.