How do guide dogs distinguish traffic lights? Guide dogs distinguish traffic lights by relying on the brightness of the two lights. Red light and green light are both gray in their eyes, but different grays can be distinguished; in addition, they can also distinguish through The actions of other pedestrians around will be used to determine whether it is passable; if there is no one around, the decision will be made by observing the traffic flow by oneself.

Everyone knows that dogs are color blind and cannot distinguish colors; guide dogs distinguish traffic lights not by distinguishing red and green lights, but by the brightness of the two lights. Although, red light and green light are all gray in their eyes, but different grays can be distinguished. Dogs have a strong ability to distinguish subtle changes in gray shades. Relying on this ability, relying on this ability, they can distinguish the light and dark of objects. changes to produce a three-dimensional visual image.

The color blindness of guide dogs is "real", because dogs have severe color weakness, but they do not rely on traffic lights to judge whether they can pass. When there are other pedestrians around, guide dogs will choose to observe the actions of other people. If most people choose to pass, the guide dog will convey a signal to the owner that it is possible to pass. Otherwise, it will continue to wait; if there are no pedestrians around, the guide dog will observe the traffic flow on its own. When the direction of travel is confirmed to be clear, the guide dog will The dog will send a pass signal to the owner.