The main difference between the cornea and the retina is that the two are different in terms of their tissue structure and their physiological location. The cornea is located on the surface of the eye and is also at the most anterior part, it is transparent and is the most refractive tissue of the refractive system of the eye, mainly allowing light to enter in order to be able to see distant objects. The surface of the cornea is devoid of blood vessels to ensure its transparent character. The retina is the innermost part of the eye and is the tissue of the fundus, which receives the light from the cornea. The retina belongs to the tissues of the nerves, which are very important for the propagation of photoelectric signals and the production of visual images, and the surface is supplied with blood vessels in order to ensure the ability of the cells in the retina to work.