How is the cow eye and the human eye different?

A cows eye is relatively larger than a humans eye. It is also oval shaped rather than circular. Humans eyes are much more flexible than cows eyes. There are also similarities, such as, both humans and cows have a tough fibrous outer layer called the sclera. We also have an optic nerve sending messages from our retina to our brain just like cows. The cow eye has four muscles that enable it to move up, down left and right, whereas our human eyes, have 6 muscles which means we are able to move our eyes more freely. This is why cows move their heads, where as humans move their eyes. Another major different is the Tapetum, this tapetum is located just behind, or sometimes within the tapetum. Have you noticed cows eyes at night 'glowing?'. This is because the light is being reflected back onto the retina!

In summary: The cows eye and human eye are quite similar. The 3 biggest differences are the shape and size, and tapetum.