posterior ciliary artery

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

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

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.

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

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

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.

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.

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.

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.