What percentage of the population may possess an extra blood supply to the eye via cilioretinal arteries?

The presence of cilioretinal arteries provides an additional blood supply to the outer retina, particularly in cases where the central retinal artery may become occluded. Research indicates that the prevalence of cilioretinal arteries varies among individuals, with estimates suggesting that approximately 15-30% of the population has this anatomical variant. This dual blood supply can be particularly significant in clinical situations, such as when assessing patients with retinal diseases or vascular occlusions. Therefore, the option indicating a percentage of 15-30% rightly reflects the common prevalence of these additional blood vessels in the general population.