Dr Paul McGreevey (Sydney University) discovered by measuring and examining the skull, nose and shape of the head and collected eyes from dogs that had died, that dog’s eyes from different dog breeds are clearly different in their dimensions. This was contrary to the text books to date. Another animal scientist Dr Alison Harman also made a huge discovery. She looked inside the eyes of dogs the retina to be specific. What she discovered is that some breeds of dog have a visual streak and some have something more similar to human eyes that have a retina with a dense area called the centralis.
So what this means is that different dog breeds not only have different shape eyes which will impact on vision but that they will see quite differently. Those with the visual streak will have a great field of vision however the dogs with the centralis will see more like us, the middle bit. Short nosed dogs have a centralis. Long nosed dogs have a visual streak. So a hunting breed like the Afghan with its long nose sees so much more to chase.
But if you think the centralis miss out, no it seems they have three times the density of nerve endings as a visual streak, so see in much higher definition which may explain their ability to be so attentive to their human face and even to watch TV
Oh, and contrary to popular belief, dogs don’t see in black and white. They see in colour. They just can’t see the colour red very well.