The anterior optic nerve receives blood primarily from the posterior ciliary arteries.

The anterior ciliary arteries are derived from the muscular branches of the ophthalmic artery.

The long posterior ciliary arteries supply the iris, ciliary body and choroid.

The ciliary arteries are divisible into three groups, the long posterior, short posterior, and the anterior.

A cycloanemization is a surgical obliteration of the long ciliary arteries in the treatment of glaucoma.

The short posterior ciliary arteries from six to twelve in number, arise from the ophthalmic as it crosses the optic nerve.

The long posterior ciliary arteries, two in number, pierce the posterior part of the sclera at some little distance from the optic nerve.

The anterior ciliary arteries branches of the ophthalmic artery and run to the front of the eyeball in company with the extraocular muscles.

There are two circulations of the eye: the retinal and uveal, supplied in humans by Ciliary arteries, originating from the ophthalmic artery.

Larvae are thought to enter the eye through the optic nerve, central retinal artery, short posterior ciliary arteries, soft tissues, or cerebrospinal fluid.

The anterior ciliary arteries are seven small arteries in each eye-socket that supply the conjunctiva, sclera and the rectus muscles.

Three of the four rectus muscles; the superior, inferior and medial, are supplied by two ciliary arteries each, while the lateral rectus only receives one branch.

Additional branches of the ophthalmic artery include the ciliary arteries, which branch into the anterior ciliary arteries.

Each rectus muscle receives blood from two anterior ciliary arteries, except for the lateral rectus muscle, which receives blood from only one.

The long posterior ciliary arteries are arteries of the head arising, together with the other ciliary arteries, from the ophtalmic artery.

In the past, anatomists made little distinction between the posterior ciliary arteries and the short and long posterior ciliary arteries often using the terms synonymously.

They run forward with the ciliary arteries in a wavy course, one set above and the other below the optic nerve, and are accompanied by the long ciliary nerves from the nasociliary.

The cherry red spot is seen because the macula receives its blood supply from the choroid, supplied by the posterior ciliary arteries, while the surrounding retina is pale due to retinal artery infarction.

The ophthalmic artery supplies the choroid via the short posterior ciliary arteries and the retina via the central retinal artery, however, the route to the choroid is typically less circuitous than the route to the retina.

While, most commonly, emboli causing amaurosis fugax are described as coming from an atherosclerotic carotid artery, any emboli arising from vasculature preceding the retinal artery, ophthalmic artery, or ciliary arteries may cause this transient monocular blindness.

Giant cell arteritis: Giant cell arteritis can result in granulomatous inflammation within the central rentinal artery and posterior ciliary arteries of eye, resulting in partial or complete occlusion, leading to decreased blood flow manifesting as amaurosis fugax.

Groups receiving 300 mg and 600 mg per day of alpha-tocopherol, delivered orally, showed statistically significant decreases in the resistivity index in the posterior ciliary arteries and in the pulsatility index in the ophthalmic arteries, after six and twelve months of therapy.

With respect to embolic and hemodynamic causes, this transient monocular visual loss ultimately occurs due to a temporary reduction in retinal artery, ophthalmic artery, or ciliary artery blood flow, leading to a decrease in retinal circulation which, in turn, causes retinal hypoxia.

Some branches of the short posterior ciliary arteries also supply the optic disc via an anastomotic ring, the Circle of Zinn-Haller or Circle of Zinn, which is associated with the fibrous extension of the ocular tendons (Annulus of Zinn).

The anterior optic nerve is supplied by the short posterior ciliary artery and choroidal circulation, while the retrobulbar optic nerve is supplied intraorbitally by a pial plexus, which arises from the ophthalmic artery, internal carotid artery, anterior cerebral artery, and anterior communicating arteries.