Pupil - Wikipedia
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 …
Pupil of the Eye: Definition, Anatomy & Function - Cleveland Clinic
2022年10月4日 · 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.
Pupil - Definition and Detailed Illustration - All About Vision
2019年2月27日 · 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 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.
The Purpose of Pupils in Our Eyes - Verywell Health
2023年11月8日 · The pupil controls how much light is let into the eye. It is very similar to a camera aperture which allows more light in for more exposure. At night, our pupils dilate to allow in …
Pupil: anatomy, structure and function - Kenhub
2023年10月30日 · 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 …
Pupil | Iris, Optic Nerve & Retina | Britannica
2024年10月27日 · 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 …
PUPIL | English meaning - Cambridge Dictionary
PUPIL definition: 1. a person, especially a child at school, who is being taught: 2. someone who is being taught a…. Learn more.
Abnormal Pupil Size: Causes and Symptoms - Verywell Health
2010年11月11日 · Normal pupil size ranges between 1/16 to 5/16 of an inch (2.0 to 8.0 millimeters), depending on the lighting. The size of your pupil can tell your healthcare provider …
Your Pupils and Eye Disorders, Nerve Problems, Concussion - WebMD
2022年9月12日 · 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 …