A parasympathetic ganglion in the orbit of the eye, supplying the intrinsic eye muscles.
A tiny ganglion in the rear portion of the orbit. It receives preganglionic fibers through the oculomotor nerve from the Edinger-Westphal nucleus of the midbrain. Six short ciliary nerves pass from it to the eyeball. Postganglionic fibers innervate the ciliary muscle, the sphincter of the iris, the smooth muscles of blood vessels of these structures, and the cornea.