Abstract
The iris is a disc-shaped diaphragm that is freely suspended within the path of light refraction in the eye. It is perforated by a central opening, the pupil, which is shifted slightly toward the nasal side. The main function of the iris is to regulate the amount of light reaching the retina, which it does by constantly adjusting the pupil size. This adjustment is effected by a muscle system composed of a circular part, the sphincter pupillae, and a radial part, the dilator pupillae.
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© 1985 Springer-Verlag New York Inc.
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Alexandridis, E. (1985). An Introductory Discussion of Anatomy as It Relates to the Pupil. In: The Pupil. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-5086-9_1
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DOI: https://doi.org/10.1007/978-1-4612-5086-9_1
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4612-9557-0
Online ISBN: 978-1-4612-5086-9
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