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How does a dog’s vision differ from human vision?

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A Labradoodle dog runs energetically through grass with a stick in its mouth, ears flopping and tail raised. — dog A Labradoodle is a cross between a Labrador Retriever and a Poodle, a mix intended to incorporate the Poodle's intelligence and low-shedding coat with a Lab's energy and determination.

Contrary to the common misconception that dogs see only in black and white, they possess a form of color blindness known as dichromacy. While most humans have three types of color-perceiving cones, dogs have only two, which limit their color spectrum to combinations of blue and yellow.1

Beyond color perception, a dog’s eyesight differs from human vision in several key ways:

Light Sensitivity: Dogs generally see better than humans in poor light, though they are less effective in bright light.2
Field of Vision: Because their eyes are positioned further toward the sides of their heads, dogs have a wider field of vision than humans.2
Focus and Depth: Dogs are less adept than humans at focusing on objects at close range or accurately judging distances.2
Specialized Sight: Certain breeds, such as the Saluki, were developed to track game by sight over long distances and are highly capable of detecting movement on the horizon.2

Additionally, dogs possess a third eyelid, a protective membrane that shields the eye from irritants.2