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  • Pupil of the Eye: Definition, Anatomy Function
    What does the pupil do? Your pupil lets light into your eye as the muscles of your iris change its shape The lens in your eye focuses light that passes through your pupil Light then goes to the back of your eye and hits your retina Your retina turns light into electrical signals Your brain receives these signals and turns them into images
  • Pupil - Wikipedia
    The pupil is the central opening of the iris on the inside of the eye, which normally appears black The grey blue or brown area surrounding the pupil is the iris The white outer area of the eye is the sclera The central outermost transparent colorless part of the eye (through which we can see the iris and pupil) is the cornea
  • Why Are My Pupils Dilated? 5 Causes of Dilated Pupils . . . - WebMD
    What makes your pupils stay open, or dilated? WebMD explains the causes, and what to do if you have dilated pupils
  • Whats Normal Pupil Size and When Do Pupils Change? - Healthline
    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
  • Pupil Function and Disorders That Affect It - Verywell Health
    A pupil is the opening created by the iris, which controls the amount of light that enters the eye Learn about medical conditions affecting the pupils
  • Human eye - Pupil, Iris, Retina | Britannica
    Why Do Humans Have Eyebrows? 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
  • 7 Causes of Dilated Pupils, From Low Light to Sexual Attraction
    In most cases, pupils change size based on the light and dilate, meaning that appear larger, when you're in a darker room But your pupils may also change size based on injuries, drug use, or
  • Pupil - American Academy of Ophthalmology
    Read an overview of general eye anatomy to learn how the parts of the eye work together Terms of Service permission The opening at the center of the iris that allows light to enter the eye





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