The cornea is the transparent front part of the eye that covers the iris, ... Because transparency is of prime importance the cornea does not have bloodvessels; it receives nutrients!
Cornea
The part of your eye that receives no blood at all is the cornea. This is the clear and transparent part of the eye and it does not have any blood vessels.
The cornea, the clear part of the eye, does not contain blood vessels and it receives oxygen supply directly from the air.
iris
The Cornea, which is a clear layer that sits on top of the eyeball.
The retina.
The cornea contains no blood vessels because it is retaining transparency is the most important thing. Since there is no blood supply, the cornea receives oxygen directly from the air.
The heart receives blood from the lungs on the left side through the Pulmonary Veins.
atrium
The retina is the reflective tissue at the back of the eye on which images are projected.
The retina is the only part of the cow's eye that has blood in it. The retina is the layer of tissue on the back portion of the eye.
kidney