**Central retinal vein** - is a deep vein internal to the eyeball, which provides blood supply to the central part of the retina. It is located in the middle ophthalmic artery and may be united with the outer retinal artery behind the eye before becoming the inferior ophthalmic artery. This vein has numerous branches and channels that are connected to various anatomical structures of the eye, including the optic disc, retinal capillary network and choroid. The central retinal vein arises from the eye and continues to the brain, where it joins the internal jugular vein. Although this vein is usually considered as part of the systemic blood vessels, it also serves