Choroidal circulation refers to the blood flow within the choroid, a layer of blood vessels located between the retina and the sclera in the eye. This circulation is crucial for supplying oxygen and nutrients to the outer layers of the retina, which are essential for visual function. The choroid contains a rich network of blood vessels that help maintain the health of the retinal cells. The primary blood supply to the choroid comes from the ophthalmic artery, which branches into smaller arteries. These vessels ensure that the choroid can effectively remove waste products and regulate temperature, supporting the overall health of the eye. Proper choroidal circulation is vital for preventing conditions like choroidal neovascularization and other retinal diseases.