What modification of the choroid that is not present in humans is found in a cow eye?

Cows have an additional structure in the choroid layer of the eye called the tapedum, which is not present in humans. The tapedum reflects light within the eye, allowing the cow to have better vision in dim lighting (ie, dusk, a full moon night and dawn) than a human. This also causes a cow's eye to 'flash' or reflect light when bright light is flickered across the dilated pupil.