Connection lost. Please refresh the page.
Online
EN | DE | PT | ES Get help How to study Login Register
Ready to learn?
Pick your favorite study tool

Iris

The iris is the circular coloured part of the eye. It is part of the vascular layer of the eye - the other two components are the choroid and the ciliary body.

The central opening of the iris is the pupil. Within the iris there are smooth muscle fibers that control the size of the pupil.

The smooth muscle fibers within the iris form the sphincter pupillae muscle, which constricts the pupillary opening, and the dilator pupillae muscle, which dilates the pupil

Terminology English and latin: Iris
Function Controls the size of the pupils

Learn everything about the anatomy of the eyeball with the following study unit!

Iris: want to learn more about it?

Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster.

What do you prefer to learn with?

“I would honestly say that Kenhub cut my study time in half.” – Read more. Kim Bengochea Kim Bengochea, Regis University, Denver

© Unless stated otherwise, all content, including illustrations are exclusive property of Kenhub GmbH, and are protected by German and international copyright laws. All rights reserved.
Bored by anatomy? Try this

Register now and grab your free ultimate anatomy study guide!

Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster.

What do you prefer to learn with?