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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.
This is also why many babies are born with blue eyes. Their eyes change color later as they begin to produce more melanin. When an individual has different amounts of melanin in each of their irises, their eyes are different colors. Heterochromia iridium (the scientific name for two different color eyes in the same individual) is relatively rare in humans but common in some animals, such as horses, cats, and certain species of dogs. A variation on the condition is heterochromia iridis, in which an individual has a variety of colors within one iris.