Common so-called vision refers to central vision. The ability of eyes to identify distant objects or targets is called hyperopia, and the ability to identify nearby small objects or targets is called myopia. In health examination, hyperopia refers to the ability to distinguish tiny or distant objects and subtle parts. Under certain conditions, the smaller the object that the eyes can distinguish, the greater the visual acuity. The basic feature of vision is to distinguish the distance between two points. Static vision refers to the visual source detected when people and observed objects are stationary. Most of the external information captured by drivers when driving a vehicle is obtained through vision, so it is of great significance to study the visual characteristics of drivers for driving safety. Based on the compatibility model, the driver's visual signal and visual characteristics are analyzed from the perspectives of engineering psychology and ergonomics, and the driver's signal and visual characteristics model is established. Four exercise methods to protect eyesight 1. Choose a quiet place in the blink of an eye, or sit or stand, relax, clear your mind, open your eyes, keep your head and neck still, and turn your eyes alone. First, stare directly below, slowly turn left, then turn directly above, turn right, and finally return to directly below. Turn clockwise nine times like this. Then turn your eyes from down to right, up, left and down again, and turn them counterclockwise for another 6 times. Do it four times in all. Every turn, the eyeball should reach the limit as much as possible. This blinking method can exercise eye muscles, improve nutrition and make eyes flexible and bright. Second, the eye breathing method chooses a place with fresh air, or sits or stands, relaxes the whole body, looks straight ahead, slowly inhales, then opens your eyes wide, pauses for a moment, then exhales the air slowly, then slowly closes your eyes, and does it for 9 times in a row. Third, the best way to burn your eyes is to sit and do it. Relax all over, close your eyes, and then quickly rub your palms. Cover your eyes with your hands when it is hot. When the heat dissipates, your hands suddenly take them away, and your eyes can't open. This can promote the blood circulation of the eyes and increase metabolism. Fourth, the eye washing method first disinfects the washbasin, pours warm water, adjusts the water temperature, puts the face into the water, opens your eyes in the water, moves the eyeball up and down, left and right for 9 times, and then rotates clockwise and counterclockwise for 9 times. At first, water will enter the eyes, making them feel uncomfortable, but with the rotation of the eyeball, the eyes will gradually feel comfortable. When doing this action, if you feel difficult to breathe, you might as well lift your face from the washbasin and take a deep breath outside. This method can wash away harmful substances and dust in the eyes, and is also effective for mild cataract, and can improve the degree of ametropia of astigmatism, hyperopia and myopia.