Seeing-eye dogs are one type of service dog, but they don’t wear a vest. Usually they are outfitted with a harness so that they can lead their handler, navigating them around obstacles. Like all other service dogs, they are allowed access to anywhere the person would go, including restaurants and public transportation. The first guide dogs were trained after World War I to help wounded veterans returning home from the front lines, although evidence suggests guide dogs were used as far back as 79 CE based on art found in the remains of a house in Pompeii, a city destroyed by the eruption of Mount Vesuvius, of a man being led by a dog.
