Overview of the Eye Structures
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Questions and Answers

What is the function of the cornea in the eye?

Provides fixed refraction to focus light onto the retina.

What is the function of the lens in the eye?

Provides adjustable refraction to focus light onto the retina.

What is the function of the iris in the eye?

Composed of contractile smooth muscle to control the size of the pupil.

Which muscle group in the iris is responsible for contraction (miosis) of the pupil?

<p>Sphincter pupillae</p> Signup and view all the answers

Which muscle group in the iris is responsible for dilation (mydriasis) of the pupil?

<p>Dilator pupillae</p> Signup and view all the answers

What controls the contraction of the sphincter pupillae muscle in the iris?

<p>Parasympathetic innervation</p> Signup and view all the answers

What controls the dilation of the dilator pupillae muscle in the iris?

<p>Sympathetic innervation</p> Signup and view all the answers

What gives the eye its characteristic color?

<p>Pigment cells in the iris</p> Signup and view all the answers

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