Fig. (2) Schematic diagram illustrating the uveoscleral outflow pathway. Aqueous humor is produced by the ciliary body, in uveoscleral route, it flows from the posterior chamber through the pupil into the anterior chamber and then (shown by dashed lines and arrowheads) through the face of the ciliary body and iris root to the ciliary muscle and suprachoroidal space to either veins in the choroid and sclera or through scleral pores to episcleral tissue.