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
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