Puppies and Dogs For Sale in UK

A Dog’s Sight

Our eyes vary in colour throughout the human race quite considerably and this is the same in the canine world but the one factor that does not vary from human to human or dog to dog is the way that eyes actually function.

The eyeball itself is round in shape and has a membrane lining the back of it called the retina, this membrane is sensitive to light. Any incoming source of light is ‘read’ and the information gathered is then transmitted through the optic nerve to the brain. The reflecting layer of the dog’s eye is called a tapetum lucidum and its purpose is to intensify any light that is available. Your dog then has the winning advantage over you during the dawn and dusk periods of the day which of course in the wild are prime hunting times, so the wild dogs such as wolves, foxes, coyotes etc, etc hunt best at these specific times of the day.

Dogs, like us and many other species, possess binocular vision. This is when two eyes are used together to see. The term, binocular, derives from the two Latin words ‘bini’ meaning double and ‘oculus’ meaning eye.

A dog’s binocular vision is the region within its total vision field that happens to overlap; this provides the dog with its perception of depth. Now the actual degree of the dog’s binocular vision is dependable upon the head shape and also the location of the eyes, I know they are always on the dog’s head so do not worry I have not gone barking mad just yet! The location can vary in the fact that a breed such as the Chow Chow has quite deep set eyes so their peripheral vision is going to be lower than most other breeds.

Now a dog’s peripheral vision is better than that of a human due to the location of their eyes, our eyes are on the front of our faces and a dog’s eyes are placed more to the side of their face.

Although they have a better peripheral vision than we do we mere humans do win when it comes to seeing detail. Sometimes a dog will not always spot a stationary item with their eyes but they will be able to detect it with their keen sense of smell. If objects are moving however the dog’s sight is outstanding as their eyesight is incredibly sensitive to movement, hence the squirrel chasing episodes which most dog owners seem to endure! The problem is though in the squirrel’s case he is pretty beat whatever he does, if he runs he is chased and if he sits still he will be smelt.

Dogs can perceive speed, direction and even movement patterns so if someone they know walks with a slight limp or unusual gait then the chances are that the dog will recognize them instantly.

So the next time you gaze lovingly into your dog’s peepers just think about everything that is going on to make them function.

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