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 correspond to the location and size of the physical pupil because it is magnified by the cornea
What Is the Hole in Your Eye Called: The Pupil Your pupil is actually a hole in your iris, not solid tissue Learn why it looks black, how it adjusts to light, and what unequal pupils can mean
Pupil Function and Disorders That Affect It - Verywell Health The pupil controls how much light enters the eye, allowing for clear vision In low light, pupils widen to let in more light, and in bright light, they narrow to prevent too much light from entering
Human eye - Pupil, Iris, Retina | Britannica 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
PUPIL Definition Meaning | Dictionary. com PUPIL definition: a person, usually young, who is learning under the close supervision of a teacher at school, a private tutor, or the like; student See examples of pupil used in a sentence
Pupil - definition of pupil by The Free Dictionary n The apparently black circular opening in the center of the iris of the eye, through which light passes to the retina [Middle English, from Old French pupille, from Latin pūpilla, little doll, pupil of the eye (from the tiny image reflected in it); see pupil1 ]