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The Posterior Ciliary Artery
Book chapter

The Posterior Ciliary Artery

Sohan Singh Hayreh
Ocular Vascular Occlusive Disorders, pp.65-97
Springer International Publishing
12/08/2014
DOI: 10.1007/978-3-319-12781-1_4

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Abstract

The ocular circulation is supplied by two sets of arteries. The central retinal artery is the main source of supply to the inner retina. The posterior ciliary artery (PCA) is the main source of blood supply to the optic nerve head (ONH), the choroid up to the equator, the retinal pigment epithelium (RPE), the outer 130 μ of the retina (and, when a cilioretinal artery is present, the entire thickness of the retina in that region), and the medial and lateral segments of the ciliary body and iris (Fig. 4.1). That makes the PCA circulation the most important component of the ocular and ONH circulation.
Central Retinal Artery Macular Region Ophthalmic Artery Optic Nerve Head Retinal Pigment Epithelium

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