I saw a program a while back where these scientists proved that dogs pay attention to human eyes for clues. When they couldn’t see the humans eyes they was more clueless. Wolves and Monkeys didn’t pay attention to our eyes.
Another major thing I noticed in the program was that they tested both dogs and wolves raised around humans since birth at a task of getting food from a box. The wolves would never stop trying, the dogs would try for awhile then go and look at the human to help them.
Since I just moved an heavy bookshelf for a persistent Yorkie who thinks there is a mouse behind it and annoys me if I don’t help him look for it then I can say Dogs know more about humans than Wolves.
It’s not exactly about human eyes, but sheep herding dogs sure have got something that the average dog doesn’t have. I even worked with a half-breed who didn’t get the directional instructions, but he would “down” in a heart beat and he sure wanted to move sheep.