Pupil of the Eye: Definition, Anatomy & Function - Cleveland Clinic
2022年10月4日 · The pupil of your eye is the black hole in the middle of your iris. Your iris is the colored part of your eye. Muscles in your iris control how big the pupil is. Usually, this happens as a result of how much light is available. This makes …
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 the eye directly, or absorbed after diffuse reflections within the eye that mostly miss exiting the narrow pupil. [citation needed] .
Pupil Definition & Meaning - Merriam-Webster
1. : a child or young person in school or in the care of a tutor or teacher. 2. : one who has been taught or influenced by a person of fame : disciple. pupil. 2 of 2 noun. : the usually round …
Dilated Pupils & Pupil Dilation: Causes & Symptoms - All About Vision
2019年2月1日 · Learn what it means to have dilated pupils (dilated eyes), what can cause pupils to dilate, and the possible treatment.
What's Normal Pupil Size and When Do Pupils Change? - Healthline
2019年3月28日 · There's an average pupil size that's considered normal. Measured in millimeters, your eyes' pupils can change based on light, medications, and even emotions.
The Purpose of Pupils in Our Eyes - Verywell Health
2023年11月8日 · 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. Pupil size is controlled by the dilator and sphincter muscles of the iris. Getty Images / Chris Raven / EyeEm.
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 light to pass through and enter the eye.
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 the retina to begin the process of sight. Typically, the pupils …
PUPIL | English meaning - Cambridge Dictionary
a person, especially a child at school, who is being taught: a second-year pupil. a primary-school pupil. The school has over 400 pupils. There is a very relaxed atmosphere between staff and …
Pupil - Definition and Detailed Illustration - All About Vision
2022年3月16日 · The pupil is the opening in the centre of the iris (the structure that gives our eyes their colour). 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. Typically, the pupils …
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