Ocular circulation refers to the blood flow within the eye, which is essential for maintaining its health and function. The primary blood supply comes from the ophthalmic artery, a branch of the internal carotid artery. This artery divides into several branches that nourish different parts of the eye, including the retina and the choroid. The retinal artery and choroidal circulation are crucial components of ocular circulation. The retinal artery supplies blood to the inner layers of the retina, while the choroid provides blood to the outer layers. Proper ocular circulation is vital for vision and overall eye health.