The astigmatism of the headlight can be adjusted with a screwdriver on the screw behind the lamp holder, and the beam of the headlight can be adjusted to the spotlight position. The following are the specific reasons why car headlights's astigmatism is out of focus: 1, improper position of the bulb: car headlights's astigmatism is out of focus, which means that the bulb of the headlight is not in the middle of the lampshade, and the height of the headlight needs to be readjusted. First check whether the headlight base is loose. 2. Inconsistent luminous points of LED lamps: Inconsistent luminous points of LED lamps and original vehicles lead to out-of-focus. It is necessary to adjust the bulb so that the light emitting point corresponds to the refraction direction of the original car reflector to achieve the effect of focusing light.