Diode laser cycloablation lowers IOP by reducing aqueous secretion by destroying secretory ciliary epithelium. Postganglionic nerve fibers leave the ciliary ganglion to innervate the ciliary sphincter. The ciliated cells are columnar epithelial cells with specialized ciliary modifications. Internal ophthalmoplegia means involvement limited to the pupillary sphincter and ciliary muscle. Postsynaptic fibers from the ciliary ganglion form the short ciliary nerves. Herpes zoster virus can attack the ciliary ganglion. Diseases of the ciliary ganglion produce a tonic pupil. These sensory axons provide innervation to the cornea, ciliary body and iris. The branches of the ciliary ganglion are the short ciliary nerves. The iris and ciliary body together are known as the anterior uvea. The parasympathetic innervation of the ciliary body is the most clearly understood. They may also decrease tubal motility and ciliary action. Each dynein molecule thus forms a cross-bridge between two adjacent microtubules of the ciliary axoneme. The ciliary body is also known to receive sympathetic innervation via long ciliary nerves. The ora serrata is the serrated junction between the retina and the ciliary body.