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Relevance. Rating Newest Oldest. Best Answer: The cow's eye is bigger, its iris is only one color, it has a tapetum, its corneas are tougher. the iris is brown on a cow and on humans its many different colors, and the tapetum is what allows animals to see well in the dark which is something a human doesnt have.Source(s): butcher.Todd S Â· 7 years ago.est Answer: The cow's eye is bigger, its iris is only one color, it has a tapetum, its corneas are tougher. the iris is brown on a cow and on humans its many different colors, and the tapetum is what allows animals to see well in the dark which is something a human doesnt have. Source(s): butcher. Todd S Â· 7 years ago.
The tapdeum lucidum is a reflective membrane in the cow's eye that allows it to see better in low light (such as at dawn or dusk).uman's don't have the tapetum lucidum layer. This is present in animal eyes. It's what causes them to glow â¦ in the dark. There sometimes is a rare occurrence when it does happen in humans, which causes them to lose their sight. I don't remember the name of the disease that my professor said it is though.