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   How Does a Dog's Vision Compare to that of a Human?You probably already know that your dog’s sense of smell is stronger than yours. But what about his vision? When it comes to low light, he can see about three times better than you can because he has large pupils and many more rods than cones in his retina. Your dog’s peripheral sight is better, too. His field of vision covers roughly 250 degrees! When it comes to sharpness and color, though, you win. What your dog sees at 20 feet, you can see clearly from 75. And your ability to see colors is better, too. Canine eyes lack one of the three sets of color receptors found in human eyes, so dogs can only see blues and yellows, not reds and greens. -Dr. Larry McDaniel, DVM for the "Purina® Animal Instincts" Podcast Series
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