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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.
A large number of animals have the tapetum lucidum, including deer, dogs, cats, cattle, horses and ferrets. Humans don't, and neither do some other primates. Squirrels, kangaroos and pigs don't have the tapeta, either. And not all eyes animals' glow the same color.Powell says this is due to different substances â like riboflavin or zinc â in an animal's tapetum.Also, she says, there are varying amounts of pigment within the retina, and that can affect the color..hat light-reflecting surface, called the tapetum lucidum, helps animals see better in the dark. When light enters the eye, it's supposed to hit a photoreceptor that transmits the information to the brain, Powell explains.