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 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.

2019年2月26日 · Adie's tonic pupil. This is a pupil that has nearly no reaction to light (direct or consensual) and there is a delayed reaction to accommodation. Adie's tonic pupil (also called …

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

2025年3月25日 · 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 …

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 …

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 …

2025年2月10日 · 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 …

2025年1月22日 · 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 …