Dogs are the only non-primate animal to look people in the eye
Dogs are huge on eye contact, and will look right into your soul to communicate needs and emotions. In fact, dogs would rather look at their humans eyes, then their actual biological dog parents. We all know this look, the “puppy dog eyes.” It helps bond the parents and the dogs.
It’s also reflective of the animals nature: timid dogs want something, while an aggressive dog is challenging you. This is why sometimes you don’t stare into an unfamiliar dog’s eyes – it’s a display of dominance.