The ciliary body is the part of the eye containing the ciliary muscle and ciliary processes. There are two sets of ciliary muscles in the eye. They are near the front of the eye, above and below the lens. They are attached to the lens by connective tissue called the zonule of Zinn, and are responsible for shaping the lens to focus light on the retina.

When the ciliary muscle relaxes, it flattens the lens which generally improves the focus for farther objects. When it contracts, the lens becomes more convex which generally improves the focus for closer objects.

See also

• Muscle
• Lens (optics)

Eye | Corpus ciliare