Choroidal vessels are a network of blood vessels located in the choroid, a layer of tissue between the retina and the sclera in the eye. These vessels play a crucial role in supplying oxygen and nutrients to the outer layers of the retina, which is essential for maintaining healthy vision. The choroidal blood supply is rich and highly vascularized, allowing for efficient nutrient delivery and waste removal. This vascular network is particularly important for the functioning of photoreceptor cells in the retina, which are responsible for converting light into visual signals.