Why dogs can not see eye to eye with people still dare to see eye to eye with strange dogs?

Dogs can not see eye to eye with people because dogs can not see eye to eye with people mainly because in the time of eye contact with strange dogs, very easy to anger the dog, no matter how gentle the dog will think it is a threat or provocation, so try to avoid eye contact with the dog; if the dog is in a state of excitement, eye contact is more likely to anger to the dog, want to contact the dog can choose from the side, the relative attack will be smaller, and ease the phenomenon of the dog attacking people.