Figure 237

Photomicrograph of the ciliary body and iridocorneal angle. This photomicrograph of the human eye shows the anterior portion of the ciliary body and parts of the iris and sclera. The inner surface of the ciliary body forms radially arranged, ridge-shaped elevations, the ciliary processes, to which the zonular fibers are anchored. The ciliary body contains the ciliary muscle, connective tissue with blood vessels of the vascular coat, and the ciliary epithelium, which is responsible for the production of aqueous humor. Anterior to the ciliary body, between the iris and the cornea, is the iridocorneal angle. The scleral venous sinus (canal of Schlemm) located in close proximity to this angle drains the aqueous humor to regulate intraocular pressure. xl20. The inset shows that the ciliary epithelium consists of two layers, the outer pigmented layer and the inner nonpigmented layer. x480.

venous sinus. Collecting vessels in the sclera, called aqueous veins because they convey aqueous humor instead of blood, transport the aqueous humor to (blood) veins located in the sclera.

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