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3 lis 2023 · The central retinal artery (Zinn’s artery) is a branch of the ophthalmic artery. It provides arterial supply to the inner surface of the eye. Specifically, this artery provides the majority of the retinal arterial supply except for the layer of cones and rods.
The central retinal artery pierces the eyeball close to the optic nerve, sending branches over the internal surface of the retina, and these terminal branches are the only blood supply to the larger part of it.
The central retinal artery is the small, first branch of the ophthalmic artery. The central retinal artery arises just below the optic nerve. For a short time, it lies inferiorly in the dural sheath surrounding the optic nerve, and then enters the optic nerve to course towards the retina (extraocular part).
24 lip 2023 · Central Retinal Artery: It is the first branch of the ophthalmic artery. It is a terminal branch supplying the inner layer of the retina, and its occlusion can cause sudden visual loss. It travels inferiorly and within the optic nerve sheath to supply the inner two-thirds of the retina.
In this page we focus on Central Retinal Artery AND on another pioneering topic — vascular supply of the optic nerve. The CRA is mainly responsible for distal optic nerve and retina. What about proximal optic nerve?
The retinal blood vessels are the central retinal artery and vein, and their branches. The arteria centralis retinæ and its accompanying vein pierce the optic nerve, and enter the bulb of the eye through the porus opticus.
The central retinal artery travels in or beside the optic nerve as it pierces the sclera then branches to supply the layers of the inner retina (i.e., the layers closest to the vitreous compartment).
