Fig. 46-5. Meridional section of the ciliary region, showing the iridocorneal angle. The vertical schemes at the left are to clarify the terminology and layers of the retina and ciliary body. The inset sketch shows (by arrows) the formation (in the ciliary processes) and circulation of the aqueous humor through the posterior (p) and anterior (a) chambers, and drainage through the trabecular meshwork to the sinus venosus sclerae and thence to the ciliary veins. Click for high resolution image.