Ciliary body

The ciliary body ( ciliary body or radiation ) is a section of the middle eye skin. It is used for suspending the lens and accommodation. Moreover, it is involved in the production of aqueous humor.

The transition from the choroid to the ciliary body is the ora serrata ( sawn edge ). From here, the ciliary body bulges in the form of an annular bead ( Ziliarring, orbiculus ciliaris ) inward towards the lens. At the apex of the bead extend ciliary ( ciliary processes ) inward. Their totality represents the Ziliarkranz (corona ciliaris ) dar. These projections arise radially zonules ( Fibrae zonulares ) and either mounted to the lens equator. The totality of the zonular fibers is called zonula ciliaris. Forward it goes into the iris.

The ciliary body consists of pigmented connective tissue. It is covered by a two-layered epithelial layer, the pars ciliaris retinae, which is a part of the pars caeca retinae ( the "blind " part ( pars caeca ) of the retina ). The windowed Strahlenkörperkapillaren together with the non-pigmented epithelial cells of the aqueous humor, and hyaluronic acid.

In the intrinsic layer of the beam body of the smooth muscle is incorporated ciliaris ( ciliary muscle ). The contraction of this parasympathetic innervated ciliary muscle causes the Nahakkommodation. He narrows the inner periphery of the beam body, causing the zonules are relaxed. Due to the inherent elasticity of the lens completes this and reduced their radius of curvature, resulting in the close range. For relaxation of the muscle, the zonules are stretched and tighten the lens against its own elasticity back into a flattened shape (remote setting). The ciliary muscle is innervated via the oculomotor nerve (third cranial nerve). The switching of the parasympathetic fibers carried in the ciliary ganglion. Sensitive is innervated by the ciliary body, the ciliary longi Nervi et breves.

Clinical references

• A detachment of the zonular fibers leading to the relocation of the lens ( lens luxation ).
• A painful ciliary spasm can occur as a result of inflammation of the anterior eye structures.